RPOARCHIVE
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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.

    GMC · 2015-2019

    Sierra HD — K2XX (2015–2019)

    sierra hd · sierra hd sle · sierra hd slt · sierra hd denali

    250 option rows 250 RPO codes 3 model years
    100% Factory-verified
    • ✓ Factory-verified · 250
    • ● Confirmed · 0
    • ◑ Single-source · 0
    • ⚠ Disputed · 0

    Applicable options

    Documented RPO codes

    Have a VIN? Decode it at DecodeThis
    Model year
    Code Option Years Notes & factory source Confidence
    Engines
    L96 Engine, Vortec 6.0L V8, variable valve timing, sequential fuel injection, E85 FlexFuel 2015, 2018–2019
    360 hp (268.4 kW) at 5400 rpm and 380 lb-ft (515 N-m) at 4200 rpm with the pickup box (E63); 322 hp (240.1 kW) at 4400 rpm and no E85 capability with the pickup box delete (ZW9); 2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.3.
    		Factory-verified
    LC8 Engine, 6.0L V8, sequential fuel injection, gaseous, hardened valves and valve seats 2015, 2019
    runs on gasoline and compressed natural gas (CNG), not E85 compatible; 360 hp (268 kW) on gasoline, 301 hp (225 kW) at 5000 rpm and 333 lb-ft (452 N-m) at 4200 rpm on CNG; requires MYD, the pickup box (E63) and the bi-fuel CNG system (FHV); the 2019 3500HD guide calls it CNG and LPG capable; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.24.
    		Factory-verified
    LML Engine, Duramax 6.6L turbo-diesel V8, B20 diesel compatible 2015
    397 hp (296 kW) at 3000 rpm and 765 lb-ft (1032.8 N-m) at 1600 rpm; requires MW7, GT4 and engine block heater (K05); includes exhaust brake (K40); SLT: also in the Duramax Plus package (PCH); Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    		Factory-verified
    L5P Engine, Duramax 6.6L turbo-diesel V8, B20 diesel compatible 2018–2019
    pairs with MW7, GT4 and the 10,000 lbs GVWR (C7A) in the 2018 guide's engine and axle tables; 445 hp (332 kW) at 2800 rpm and 910 lb-ft (1220 Nm) at 1600 rpm in the 2018 and 2019 guides; includes exhaust brake (K40) and engine block heater (K05); 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.25.
    		Factory-verified
    Transmissions
    MYD Transmission, 6 speed automatic, heavy-duty, electronically controlled 2015, 2018–2019
    overdrive, tow/haul mode, cruise grade braking and powertrain grade braking; with the 6.0L V8 (L96 or LC8); 2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.3.
    		Factory-verified
    MW7 Transmission, Allison 1000 6 speed automatic, electronically controlled 2015, 2018–2019
    overdrive, electronic engine grade braking and tow/haul mode; with the Duramax diesel (LML in 2015, L5P in 2018 and 2019); 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.26.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.25.
    		Factory-verified
    NQG Transfer case, floor-mounted shifter 2015, 2018–2019
    4WD only; 2015 marks: Sierra: included in the trim group; SLE, SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.8.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.8.
    		Factory-verified
    NQF Transfer case, electronic shift, rotary dial controls 2015, 2018–2019
    requires 4WD; 2015 marks: Sierra: not offered; SLE, SLT: included in the trim group; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.8.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.8.
    		Factory-verified
    Axles
    G80 Differential, rear, heavy-duty locking 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.3.
    		Factory-verified
    GT4 Axle, rear, 3.73 ratio 2015, 2018–2019
    requires the Duramax diesel (LML in 2015, L5P in 2018 and 2019); 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.49.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.47.
    		Factory-verified
    GT5 Axle, rear, 4.10 ratio 2015, 2018–2019
    with the 6.0L V8 (L96 or LC8); 2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.3.
    		Factory-verified
    Packages & Trims
    1SA Trim group, Sierra 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.55.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.52.
    		Factory-verified
    3SA Trim group, SLE 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.55.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.52.
    		Factory-verified
    4SA Trim group, SLT 2018–2019
    the 2015 guides and the 2019 Wayback capture print it only with a footnote digit attached (4SA1, 4SA3), so 2015 is not claimed and 2019 rests on the 3500HD order guide, which prints it cleanly on its 4SA color and trim page; 2018: GM's 2018 Sierra 2500HD order guide, same page layout
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.59.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.56.
    		Factory-verified
    PDD Convenience package 2015, 2018–2019
    one code for two trim-specific packages: on Sierra (1SA) the Sierra Convenience Package (heated power mirrors DL8, DPN on the 3500HD; remote keyless entry AQQ; rear vision camera UVC in 2015; 110-volt outlet KI4; LED cargo box lighting UF2; deep-tinted glass AKO; the 2019 package adds remote locking tailgate A91 and cab-specific mirrors), on SLE (3SA) the SLE Convenience Package (power-adjustable pedals JF4, rear park assist UD7, sliding rear window A48, rear-window defogger C49); 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.13.
    		Factory-verified
    PEF Sierra convenience plus package 2018–2019
    Crew Cab only; trailering mirrors (DPN), remote keyless entry (AQQ), remote locking tailgate (A91), 110-volt outlet (KI4), LED cargo box lighting (UF2), deep-tinted glass (AKO), OnStar (UE1), 4G LTE (VV4) and trailering equipment (Z82); not with the Duramax diesel (L5P) or the pickup box delete (ZW9); 2019 marks: Sierra: O; SLE, SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.13.
    		Factory-verified
    PCM SLE preferred package 2015, 2018–2019
    driver 10-way power seat (AG1, with the AZ3 bench), remote start (BTV), front fog lamps (T3U), universal home remote (UG1), rear-window defogger (C49), tilt and telescoping column (N37), 110-volt outlet (KI4) and dual-zone automatic climate control (CJ2); 2015 marks: Sierra, SLT: not offered; SLE: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.14.
    		Factory-verified
    PEH HD SLE gas preferred plus package 2018–2019
    the SLE preferred package content plus spray-on bedliner (CGN) and LPO all-weather floor liner (RIA), and trailering mirrors (DPN) on Crew Cab; not with the Duramax diesel (L5P); the 2018 guide prints HD SLE Preferred Plus Package; 2019 marks: Sierra, SLT: not offered; SLE: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.14.
    		Factory-verified
    PCH Duramax plus package 2015, 2018–2019
    Duramax diesel (LML in 2015, L5P in 2018 and 2019), Allison 6 speed (MW7), Bose audio (UQA), front and rear park assist (UD5) and 8 inch navigation radio (IO6); not with the pickup box delete (ZW9) or rear bumper delete (9J4); 2015 marks: Sierra, SLE: not offered; SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.24.
    		Factory-verified
    PDR 2500HD SLT gas premium plus package 2018–2019
    Crew Cab or Double Cab; the 2018 guide lists front and rear park assist (UD5), heated steering wheel (UVD), sliding rear window (A48), LPO chrome assist steps (VXH), Bose audio (UQA) and the navigation radio (IO6) among its contents; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.19.
    		Factory-verified
    Y65 Driver alert package 2015, 2018–2019
    lane departure warning (UFL), forward collision alert (UEU), safety alert seat and front and rear park assist (UD5); requires leather bucket seats (AN3) with ventilated (KB6 in 2015, KQV in 2019) seating; 2015 marks: Sierra, SLE: not offered; SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.14.
    		Factory-verified
    GAT All Terrain HD package 2015, 2018–2019
    4WD only; LT265/70R18E all-terrain tires (QGM), rear park assist (UD7), off-road suspension (Z71), underbody shield (NZZ), fog lamps (T3U), all-terrain grille insert, body-color bumpers (VB5, VT5), sill plates and carpeted floor mats (B58); limited to six exterior colors in 2015; the 2018 guide limits it to Crew Cab and adds the spray-on bedliner (CGN); 2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.18.
    		Factory-verified
    STF All Terrain X package 2018–2019
    the 2018 guide prints All Terrain X HD Package; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.19.
    		Factory-verified
    PDY All Terrain chrome bumpers package 2015
    chrome front and rear bumpers (V46, VJH) and rear bumper corner steps (BWN); requires the All Terrain HD package (GAT); Sierra: not offered; SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    VYU Snow plow prep package 2015, 2018–2019
    4WD only; power feed for backup and roof emergency light, 220-amp alternator (KW5), forward lamp wiring harness, roof-mounted lamp provision (TRW), underbody shields (NZZ) and heavy-duty front springs; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.24.
    		Factory-verified
    Z71 Off-road suspension package 2015, 2018–2019
    Z71 chrome front fender emblems, twin tube Rancho shocks, hill descent control (JHD), underbody shield (NZZ) and off-road driver information center graphics; not with the pickup box delete (ZW9); the 3500HD guide requires the LT265/70R18E all-terrain tires (QGM); 2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.25.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.25.
    		Factory-verified
    Z85 Suspension package, heavy-duty handling and trailering 2015, 2018–2019
    51mm twin tube shock absorbers and 33mm front stabilizer bar; the 2015 3500HD guide calls it the standard suspension package; 2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.3.
    		Factory-verified
    Z82 Trailering package 2015, 2018–2019
    2.5 inch hitch platform with 2.0 inch insert, 7-wire harness with independent fused circuits and a 7-way sealed connector with a 4-way connector; includes the trailer brake controller (JL1) on Sierra; not with the pickup box delete (ZW9); 2015 marks: Sierra: O; SLE, SLT: included in the trim group; 2015 3500HD: Sierra, SLE, SLT: included in the trim group; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.8.
    		Factory-verified
    PDH LPO, GMC interior protection package 2015, 2018
    LPO all-weather floor mats (VAV) and LPO rubber bed mat (VBR); dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.17.
    		Factory-verified
    PDL LPO, cargo convenience package 2015, 2018–2019
    LPO all-weather floor mats (VAV), front console organizer (VKW) and rear underseat storage (VBJ); dealer-installed; requires bucket seats (A95 or AN3); 2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.17.
    		Factory-verified
    PDM LPO, bed protection package 2015
    LPO bed mat (VBR), tailgate liner (VUK) and soft folding tonneau cover (5JY); dealer-installed; Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    PDQ LPO, chrome appearance package 2015
    LPO 4 inch round chrome assist steps (VXJ), polished exhaust tip (VQZ) and chrome recovery hooks (SDA); dealer-installed; requires the 6.0L V8 (L96 or LC8); Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    PDO LPO, protection package 2019
    LPO all-weather floor liner (RIA) and black molded splash guards (VQK); dealer-installed; 2019 marks: Sierra, SLE, SLT: O
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    		Factory-verified
    PCO LPO, essentials package 2019
    includes LPO 4 inch round chrome tubular assist steps (VXJ), tri-folding soft tonneau cover (5JY) and all-weather floor liners (RIA); requires color-keyed carpeting (B30) and LED cargo box lighting (UF2); not with other tonneau covers or assist steps, the Cargo Convenience (PDL) or Protection (PDO) packages or the pickup box delete (ZW9); contents read from GM's 2019 Sierra 3500HD order guide; the 2019 Wayback interior page names it in its footnotes
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.20.
    		Factory-verified
    U42 Entertainment package, rear seat DVD/Blu-Ray player 2015, 2018–2019
    9.2 inch LCD display, two wireless headphones and remote; requires leather bucket seats (AN3) and Bose audio (UQA); replaces the CD player (TG5); 2015 marks: Sierra, SLE: not offered; SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.15.
    		Factory-verified
    Equipment
    AY0 Air bags, single-stage frontal and thorax side-impact, driver and front passenger, head curtain side-impact, front and rear outboard 2015, 2018–2019
    the 2018 and 2019 guides describe the Double Cab and Regular Cab with a dual-stage front passenger air bag and passenger sensing; 2015 marks: Sierra, SLE, SLT: S; 2015 3500HD: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.1.
    		Factory-verified
    AK5 Air bags, frontal, driver and right front passenger, single stage 2015, 2019
    only in: 3500HD; 2015 marks: Sierra, SLE, SLT: S; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.1.
    		Factory-verified
    C99 Air bag deactivation switch, front passenger 2018–2019
    with the pickup box delete (ZW9) on Double Cab and Regular Cab; 2019 marks: Sierra, SLE: O; SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.32.
    		Factory-verified
    C67 Air conditioning, single-zone 2015, 2018–2019
    2015 marks: Sierra, SLE: S; SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.1.
    		Factory-verified
    CJ2 Air conditioning, dual-zone automatic climate control 2015, 2018–2019
    included with the SLE preferred package (PCM); 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.4.
    		Factory-verified
    IO3 Audio system, 4.2 inch diagonal color display, AM/FM stereo, USB ports, auxiliary jack, SD card slot 2015
    Sierra: included in the trim group; SLE, SLT: not offered
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    		Factory-verified
    IO4 Audio system, 4.2 inch diagonal color display with IntelliLink, AM/FM stereo, USB ports, auxiliary jack, SD card slot, Bluetooth audio, voice recognition 2015
    includes OnStar (UE1), CD player (TG5) and 4G LTE Wi-Fi (VV4); Sierra: O; SLE, SLT: not offered
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    		Factory-verified
    IOB Audio system, 7 inch diagonal color touch screen, GMC Infotainment System, AM/FM, USB ports, auxiliary jack, Bluetooth audio 2018–2019
    2019 marks: Sierra: S; SLE, SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.1.
    		Factory-verified
    IO5 Audio system, 8 inch diagonal color touch screen, AM/FM/SiriusXM, USB ports, auxiliary jack, Bluetooth audio, voice recognition 2015, 2018–2019
    IntelliLink in 2015; GMC Infotainment System with HD Radio in the 2018 and 2019 guides; 2015 marks: Sierra: not offered; SLE, SLT: included in the trim group; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.4.
    		Factory-verified
    IO6 Audio system, 8 inch diagonal color touch screen with navigation, AM/FM/SiriusXM, USB ports, auxiliary jack, Bluetooth audio, voice recognition 2015, 2018–2019
    IntelliLink in 2015; GMC Infotainment System with HD Radio in the 2018 and 2019 guides; included in the Duramax plus package (PCH); 2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.14.
    		Factory-verified
    TG5 CD/MP3 player, single-slot 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.4.
    		Factory-verified
    U2K SiriusXM satellite radio, 3-month All Access trial 2015, 2018–2019
    not provided on fleet daily rental orders; 2015 marks: Sierra: O; SLE, SLT: included in the trim group; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.4.
    		Factory-verified
    U2L Radio, HD 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.4.
    		Factory-verified
    UQ3 Audio system, 6 speakers 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.1.
    		Factory-verified
    UQA Audio system, Bose, 6 speakers 2015, 2018–2019
    7 speakers with a subwoofer when ordered with bucket seats; 2015 marks: Sierra, SLE: not offered; SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.15.
    		Factory-verified
    D07 Console, floor-mounted 2015, 2018–2019
    cup holders, phone storage, power cord management and hanging file holder; the 2019 console adds wireless charging (K4C); comes with bucket seats (A95 or AN3); 2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.34.
    		Factory-verified
    K34 Cruise control, steering wheel-mounted 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.1.
    		Factory-verified
    UDC Driver information center, 3.5 inch diagonal monochrome display 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.4.
    		Factory-verified
    UDD Driver information center, 4.2 inch diagonal color display 2015, 2018–2019
    driver personalization; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.4.
    		Factory-verified
    C49 Defogger, rear-window, electric 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.4.
    		Factory-verified
    AU3 Door locks, power 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.1.
    		Factory-verified
    BTV Remote vehicle starter system 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.4.
    		Factory-verified
    AQQ Remote keyless entry 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.5.
    		Factory-verified
    A91 Tailgate, remote locking 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.5.
    		Factory-verified
    BG9 Floor covering, rubberized vinyl, graphite 2015, 2018–2019
    2015 marks: Sierra: S; SLE: O; SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.1.
    		Factory-verified
    B30 Floor covering, carpet, color-keyed 2015, 2018–2019
    the 2015 guides include rubberized vinyl floor mats with it; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.5.
    		Factory-verified
    B32 Floor mats, rubberized vinyl, front 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.5.
    		Factory-verified
    B33 Floor mats, rubberized vinyl, rear 2018–2019
    Crew Cab and Double Cab only; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.5.
    		Factory-verified
    B58 Floor mats, carpeted, color-keyed, first and second row 2015, 2018–2019
    2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.5.
    		Factory-verified
    DD8 Mirror, inside rearview, auto-dimming 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.5.
    		Factory-verified
    UE1 OnStar plan, 6 months 2015
    the 2015 guides print OnStar Directions and Connections for 6 months; the 2018 guide prints an OnStar Guidance plan trial with no term, so 2018 is not claimed; the 2019 guide prints OnStar and GMC connected services capable (fleet orders receive a 3-month trial), so 2019 is not claimed; 2015 marks: Sierra: O; SLE, SLT: included in the trim group
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    		Factory-verified
    VV4 OnStar 4G LTE Wi-Fi hotspot 2015, 2018–2019
    2015 marks: Sierra: O; SLE, SLT: included in the trim group; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.5.
    		Factory-verified
    JF4 Pedals, power-adjustable 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.5.
    		Factory-verified
    KI4 Power outlet, 110-volt AC 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.5.
    		Factory-verified
    UVC Rear vision camera 2015, 2018–2019
    the 2015 guides add dynamic guide lines; not included with the pickup box delete (ZW9); 2015 marks: Sierra: O; SLE, SLT: included in the trim group; 2019: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.1.
    		Factory-verified
    AE7 Seats, front 40/20/40 split-bench, 3-passenger, reclining 2015, 2018–2019
    vinyl with fixed lumbar or cloth with manual driver lumbar; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.5.
    		Factory-verified
    AZ3 Seats, front 40/20/40 split-bench, 3-passenger, reclining, lockable storage 2015, 2018–2019
    manual driver lumbar and seat cushion storage compartment; 2015 marks: Sierra, SLT: not offered; SLE: included in the trim group; 2019: Sierra, SLT: not offered; SLE: S; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    A95 Seats, front bucket, cloth, heated, power 2015, 2018–2019
    10-way power driver and 6-way power passenger seat, power recline and lumbar, floor console (D07); 2015 marks: Sierra, SLT: not offered; SLE: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.16.
    		Factory-verified
    B3F Seats, front 40/20/40 split-bench, leather-appointed, heated, power 2015, 2018–2019
    10-way power driver and passenger seat, power recline and lumbar, 2-position driver memory; 2015 marks: Sierra, SLE: not offered; SLT: included in the trim group; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    AN3 Seats, front bucket, leather-appointed, full-feature, heated, power 2015, 2018–2019
    10-way power driver and passenger seat, 2-way power lumbar, 2-position driver memory, floor console (D07); 2015 marks: Sierra, SLE: not offered; SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.16.
    		Factory-verified
    A68 Seat, rear 60/40 folding bench, 3-passenger 2015, 2018–2019
    child seat top tether anchor; Crew Cab; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    AM7 Seat, rear full-width folding bench, 3-passenger 2018–2019
    child seat top tether anchor; Double Cab; 2019 marks: Sierra: included in the trim group; SLE, SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    AG1 Seat adjuster, driver 10-way power 2015, 2018–2019
    with the AZ3 bench; included with the SLE preferred package (PCM); 2015 marks: Sierra, SLT: not offered; SLE: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.36.
    		Factory-verified
    KA1 Seats, heated, driver and front passenger 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    KB6 Seats, heated and cooled, perforated leather-appointed front bucket 2015
    requires leather bucket seats (AN3); Sierra, SLE: not offered; SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    		Factory-verified
    KQV Seats, heated and ventilated, perforated leather-appointed front bucket 2018–2019
    requires leather bucket seats (AN3); 2019 marks: Sierra, SLE: not offered; SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.16.
    		Factory-verified
    NP5 Steering wheel, leather-wrapped, audio and cruise controls 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    UK3 Steering wheel controls, audio 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    NK5 Steering wheel, base 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    UVD Steering wheel, heated, leather-wrapped, audio and cruise controls 2015, 2018–2019
    2015 marks: Sierra, SLE: not offered; SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.16.
    		Factory-verified
    N33 Steering column, manual tilt 2015, 2018–2019
    2015 marks: Sierra, SLE: S; SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.1.
    		Factory-verified
    N37 Steering column, manual tilt and telescoping 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    CF5 Sunroof, power 2015, 2018–2019
    not with the roof lamp provision (TRW) or snow plow prep package (VYU); 2015 marks: Sierra, SLE: not offered; SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.16.
    		Factory-verified
    TDM Teen Driver 2018–2019
    configurable key fob settings and in-vehicle report card; 2019 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.1.
    		Factory-verified
    UTJ Theft-deterrent system, unauthorized entry 2015, 2018–2019
    comes with remote start (BTV); 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    UJM Tire pressure monitoring system 2015, 2018–2019
    does not cover the spare; the 2018 and 2019 guides add Tire Fill Alert; 2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    		Factory-verified
    UG1 Universal home remote 2015, 2018–2019
    2015 marks: Sierra: not offered; SLE: O; SLT: included in the trim group; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    9L7 Upfitter switches, 4 2015, 2018–2019
    the 2018 and 2019 guides add four 30-amp circuits for aftermarket accessories; 2015 marks: Sierra: O; SLE, SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.16.
    		Factory-verified
    DH6 Visors, driver and front passenger, illuminated vanity mirrors 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    A48 Window, rear, power sliding, with defogger 2015, 2018–2019
    2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.17.
    		Factory-verified
    A31 Windows, power, driver express up and down, express down on other windows 2015, 2018–2019
    2019 marks: Sierra: O; SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    		Factory-verified
    K4C Wireless charging 2018–2019
    2019 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.17.
    		Factory-verified
    UFL Lane departure warning 2019
    in the driver alert package (Y65); 2019 marks: Sierra, SLE: not offered; SLT: O
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    		Factory-verified
    UEU Forward collision alert 2018–2019
    in the driver alert package (Y65); 2019 marks: Sierra, SLE: not offered; SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.32.
    		Factory-verified
    CGN Bedliner, spray-on, GMC logo 2015, 2018–2019
    polyurea and polyurethane liner covering the bed below the rails and the tailgate; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.19.
    		Factory-verified
    BWN Bumper, rear, corner steps 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.1.
    		Factory-verified
    V46 Bumper, front, chrome 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.1.
    		Factory-verified
    VJH Bumper, rear, chrome, corner steps 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    VB5 Bumper, front, body-color 2015, 2018–2019
    2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.40.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.38.
    		Factory-verified
    VT5 Bumper, rear, body-color, corner steps 2015, 2018–2019
    2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.40.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.39.
    		Factory-verified
    9J4 Bumper, rear, delete 2015, 2018–2019
    comes with the pickup box delete (ZW9); 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.19.
    		Factory-verified
    D75 Door handles, body-color 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.6.
    		Factory-verified
    E20 Door handles, chrome 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.6.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.6.
    		Factory-verified
    T3U Fog lamps, front, halogen 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    		Factory-verified
    CTD Cargo tie-downs, 4, movable upper 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    V22 Grille surround, chrome 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    AKP Glass, solar-absorbing, tinted 2015, 2018–2019
    2015 marks: Sierra: S; SLE, SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    AKO Glass, deep-tinted 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    		Factory-verified
    VK3 License plate kit, front 2015, 2018–2019
    forced on orders shipped to states requiring a front plate; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.19.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.18.
    		Factory-verified
    U01 Lamps, roof marker, smoked amber 2015, 2018–2019
    not with California emissions (YF5); 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.20.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.18.
    		Factory-verified
    UF2 Lamps, cargo box, LED 2015, 2018–2019
    switch on the center switch bank; 2015 marks: Sierra: O; SLE, SLT: included in the trim group; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    		Factory-verified
    DE2 Mirrors, outside, manual, black 2015, 2018
    only in: 2500HD (the 2015 3500HD guide does not list it); 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    		Factory-verified
    DF2 Mirrors, outside, vertical trailering, manual folding and extending, black 2015, 2018–2019
    lower convex spotter glass; the 2015 guides say camper-style, the 2018 guide trailering; 2015 marks: Sierra: O; SLE, SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.20.
    		Factory-verified
    DL8 Mirrors, outside, heated, power-adjustable 2015, 2018–2019
    driver-side spotter mirror; black on Sierra, body-color on SLE; only in: 2500HD (the 2015 3500HD guide does not list it); 2015 marks: Sierra: O; SLE: included in the trim group; SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    		Factory-verified
    DL3 Mirrors, outside, heated, power-adjustable, power-folding, chrome caps 2015, 2018
    driver-side auto-dimming, turn signal indicators and puddle lamps; only in: 2500HD (the 2015 3500HD guide does not list it); 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    		Factory-verified
    DPN Mirrors, outside, vertical trailering, heated, power-adjustable upper glass, manual folding and extending, black 2015, 2018–2019
    turn signal indicators, auxiliary cargo and clearance lamps; includes auto-dimming inside mirror (DD8); the 2015 guides say camper; 2015 marks: Sierra, SLE: O; SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.20.
    		Factory-verified
    DQS Mirrors, outside, vertical trailering, heated, power-adjustable, memory, power-folding, chrome 2015, 2018–2019
    turn signal indicators, auxiliary cargo and clearance lamps; the 2015 guides say camper; 2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.20.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.7.
    		Factory-verified
    DP6 Mirror caps, body-color 2015, 2018
    only in: 2500HD (the 2015 3500HD guide does not list it); 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    		Factory-verified
    DP9 Mirror caps, chrome 2015, 2018
    only in: 2500HD (the 2015 3500HD guide does not list it); 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    		Factory-verified
    B86 Moldings, bodyside, body-color 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.7.
    		Factory-verified
    B85 Moldings, bodyside, chrome 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.7.
    		Factory-verified
    E63 Pickup box 2015, 2018–2019
    the 2015 guides say Wideside; 2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    ZW9 Pickup box delete 2015, 2018–2019
    includes the rear bumper delete (9J4) and spare tire and carrier delete and deletes the trailering equipment (Z82); long box models only; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.20.
    		Factory-verified
    TRW Provision, cab roof-mounted lamp or beacon 2015, 2018–2019
    instrument panel switch and wiring for an upfitter lamp; included in the snow plow prep package (VYU); 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.20.
    		Factory-verified
    UD7 Rear park assist, ultrasonic 2015, 2018–2019
    2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.21.
    		Factory-verified
    UD5 Front and rear park assist, ultrasonic 2015, 2018–2019
    2015 marks: Sierra, SLE: not offered; SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.21.
    		Factory-verified
    V76 Recovery hooks, front, frame-mounted, black 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    PPA Tailgate, EZ-Lift and lower 2015, 2018–2019
    2015 marks: Sierra: not offered; SLE, SLT: included in the trim group; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    A60 Tailgate, locking 2015, 2018–2019
    uses the ignition key; 2015 marks: Sierra, SLE, SLT: S; 2019: Sierra: S; SLE, SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.1.
    		Factory-verified
    SAF Tire carrier lock 2015, 2018–2019
    keyed cylinder using the ignition key; 2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    QHQ Tires, LT245/75R17E all-season, blackwall 2015, 2018
    only in: 2500HD (the 2015 3500HD guide does not list it); 2015 marks: Sierra, SLE: S; SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    		Factory-verified
    QXT Tires, LT265/70R17E all-terrain, blackwall 2015, 2018
    only in: 2500HD (the 2015 3500HD guide does not list it); 2015 marks: Sierra, SLE: O; SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.21.
    		Factory-verified
    QGM Tires, LT265/70R18E all-terrain, blackwall 2015, 2018–2019
    included with the All Terrain HD package (GAT); 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.21.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.19.
    		Factory-verified
    QWF Tires, LT265/70R18E all-season, blackwall 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    QFC Tires, LT265/60R20E all-terrain, blackwall 2015, 2018
    only in: 2500HD (the 2015 3500HD guide does not list it); 2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.21.
    		Factory-verified
    QQO Tires, LT235/80R17E all-season, highway 2015, 2019
    dual rear wheels; only in: 3500HD; 2015 marks: Sierra, SLE, SLT: S; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    QZT Tires, LT235/80R17E all-terrain 2015, 2019
    dual rear wheels; only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.19.
    		Factory-verified
    ZHQ Tire, spare, LT245/75R17E all-season, blackwall 2015, 2018
    only in: 2500HD (the 2015 3500HD guide does not list it); 2015 marks: Sierra, SLE: O; SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.43.
    		Factory-verified
    ZXT Tire, spare, LT265/70R17E all-terrain, blackwall 2015, 2018
    only in: 2500HD (the 2015 3500HD guide does not list it); 2015 marks: Sierra, SLE: O; SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.43.
    		Factory-verified
    ZWF Tire, spare, LT265/70R18E all-season, blackwall 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.43.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.19.
    		Factory-verified
    ZQO Tire, spare, LT235/80R17E highway 2015, 2019
    dual rear wheels; only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.19.
    		Factory-verified
    ZZT Tire, spare, LT235/80R17E all-terrain 2015, 2019
    dual rear wheels; only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.19.
    		Factory-verified
    PYN Wheels, 17 inch steel 2015, 2018
    17 x 7.5 steel spare; only in: 2500HD (the 2015 3500HD guide does not list it); 2015 marks: Sierra: S; SLE, SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    		Factory-verified
    PYQ Wheels, 17 inch aluminum, machined 2015, 2018
    17 x 7.5 steel spare; only in: 2500HD (the 2015 3500HD guide does not list it); 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    		Factory-verified
    PYT Wheels, 18 inch steel, painted 2015, 2018–2019
    18 x 8 steel spare; 2015 marks: Sierra: O; SLE, SLT: not offered; 2015 3500HD: Sierra: S; SLE, SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.21.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    PYR Wheels, 18 inch aluminum, chromed 2015, 2018–2019
    18 x 8 steel spare; included with the All Terrain HD package (GAT); 2015 marks: Sierra: not offered; SLE: O; SLT: included in the trim group; 2015 3500HD: Sierra: not offered; SLE, SLT: included in the trim group; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.7.
    		Factory-verified
    PTW Wheels, 18 inch aluminum, chromed 2015
    18 x 8 steel spare; the 2015 guides print it with the PYR wording and mark it no longer available from September 18, 2014; Sierra: not offered; SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    PYS Wheels, 20 inch aluminum, chromed 2015
    18 x 8 steel spare; only in: 2500HD (the 2015 3500HD guide does not list it); Sierra, SLE: not offered; SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    PYW Wheels, 17 inch steel, painted 2015, 2019
    dual rear wheels; 17 inch steel spare; only in: 3500HD; 2015 marks: Sierra, SLE, SLT: S; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    RS7 Wheels, 17 inch aluminum, forged, polished 2015, 2019
    dual rear wheels; 17 inch steel spare; only in: 3500HD; 2015 marks: Sierra: not offered; SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.19.
    		Factory-verified
    NZ4 Wheel, spare, 17 x 7.5 full-size, steel 2015, 2018
    with 17 inch wheels; only in: 2500HD (the 2015 3500HD guide does not list it); 2015 marks: Sierra, SLE: S; SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    		Factory-verified
    N79 Wheel, spare, 18 x 8 full-size, steel 2015, 2018–2019
    with 18 or 20 inch wheels; 2015 marks: Sierra, SLE: O; SLT: included in the trim group; 2015 3500HD: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    SKP Wheel, spare, 17 x 6.5 full-size, steel 2015, 2019
    dual rear wheels; only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.19.
    		Factory-verified
    P03 Wheel trim, painted trim skins and painted center caps 2015, 2019
    dual rear wheels; only in: 3500HD; 2015 marks: Sierra: S; SLE, SLT: not offered; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    P06 Wheel trim, chrome trim skins and chrome center caps 2015, 2019
    dual rear wheels; only in: 3500HD; 2015 marks: Sierra: not offered; SLE, SLT: included in the trim group; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.7.
    		Factory-verified
    B1J Wheelhouse liners, rear 2015, 2018–2019
    single rear wheel only; 2015 marks: Sierra: not offered; SLE, SLT: included in the trim group; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.7.
    		Factory-verified
    R8M Assist step delete 2015, 2018–2019
    deletes the standard LPO 6 inch chrome assist steps (VXH) when another LPO step is ordered; the 2018 guide prints Assist Steps Not Desired or Alternate Step Desired; only in: 3500HD in 2015; 2015 marks: Sierra, SLE: not offered; SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.22.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.20.
    		Factory-verified
    KG4 Alternator, 150 amps 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.7.
    		Factory-verified
    KW5 Alternator, 220 amps 2015, 2018–2019
    included in the snow plow prep package (VYU); 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.24.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.22.
    		Factory-verified
    KHB Alternators, dual, 150 amps and 220 amps 2015, 2018–2019
    requires the Duramax diesel; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.24.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.22.
    		Factory-verified
    K47 Air cleaner, high-capacity 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.
    		Factory-verified
    K4B Battery, auxiliary, 730 cold-cranking amps 2015, 2018–2019
    not with the Duramax diesel; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.24.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.22.
    		Factory-verified
    J95 Brakes, 4-wheel antilock, 4-wheel disc, DuraLife rotors 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.3.
    		Factory-verified
    J96 Brakes, 4-wheel antilock, 4-wheel disc, DuraLife rotors, dual rear wheels 2015, 2019
    only in: 3500HD; 2015 marks: Sierra, SLE, SLT: S; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.3.
    		Factory-verified
    FHV Fuel system, bi-fuel, compressed natural gas 2015
    runs on gasoline and CNG, not E85 compatible; tank in the forward end of the bed; requires the gaseous 6.0L V8 (LC8); Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    		Factory-verified
    KC4 Cooling, external engine oil cooler 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.3.
    		Factory-verified
    KNP Cooling, auxiliary external transmission oil cooler 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.2.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.3.
    		Factory-verified
    V10 Cover, winter, radiator grille and front bumper 2015, 2018–2019
    for the Duramax diesel; required on orders shipped to cold-weather states; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.24.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.22.
    		Factory-verified
    K40 Exhaust brake 2015, 2018–2019
    comes with the Duramax diesel; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.48.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.46.
    		Factory-verified
    K05 Engine block heater 2015, 2018–2019
    comes with the Duramax diesel; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.25.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.23.
    		Factory-verified
    JHD Hill descent control 2015, 2018–2019
    in the off-road suspension package (Z71); 2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.49.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.47.
    		Factory-verified
    GEH GVWR, 9,500 lbs (4309 kg) 2015, 2018
    with the 6.0L V8; only in: 2500HD (the 2015 3500HD guide does not list it); 2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.3.
    		Factory-verified
    C4M GVWR, 9,900 lbs (4490 kg) 2015, 2018
    with the 6.0L V8; only in: 2500HD (the 2015 3500HD guide does not list it); 2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.3.
    		Factory-verified
    C7A GVWR, 10,000 lbs (4536 kg) 2015, 2018–2019
    2500HD: with the Duramax diesel; 3500HD: single rear wheels with the 6.0L V8; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.25.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.24.
    		Factory-verified
    C7G GVWR, 10,500 lbs (4763 kg), single rear wheels 2015, 2019
    only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.24.
    		Factory-verified
    JFK GVWR, 10,700 lbs (4854 kg), single rear wheels 2015, 2019
    only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.24.
    		Factory-verified
    JFL GVWR, 10,800 lbs (4899 kg), single rear wheels 2015, 2019
    only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.24.
    		Factory-verified
    C7E GVWR, 11,000 lbs (4990 kg), single rear wheels 2015, 2019
    only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.24.
    		Factory-verified
    JFN GVWR, 11,100 lbs (5035 kg), single rear wheels 2015, 2019
    only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.24.
    		Factory-verified
    C7W GVWR, 11,400 lbs (5171 kg), single rear wheels 2015, 2019
    only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.25.
    		Factory-verified
    G1Y GVWR, 11,500 lbs (5216 kg), single rear wheels 2015, 2019
    only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.25.
    		Factory-verified
    C7V GVWR, 11,600 lbs (5262 kg), single rear wheels 2015, 2019
    only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.25.
    		Factory-verified
    CHX GVWR, 13,025 lbs (5908 kg), dual rear wheels 2015, 2019
    only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.25.
    		Factory-verified
    SRW Chassis, single rear wheel 2015, 2019
    only in: 3500HD; 2015 marks: Sierra, SLE, SLT: S; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 3500hd fleet order guide wayback, p.4.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.3.
    		Factory-verified
    UF3 Switch, high idle 2015, 2018–2019
    2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.25.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.25.
    		Factory-verified
    JL1 Trailer brake controller, integrated 2015, 2018–2019
    2015 marks: Sierra: O; SLE, SLT: S; 2015 3500HD: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.3.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.3.
    		Factory-verified
    UY2 Wiring provisions, camper, fifth wheel and gooseneck trailer 2015, 2018–2019
    additional 7-way harness at the rear of the pickup box; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.26.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.25.
    		Factory-verified
    NZZ Underbody shield, frame-mounted 2015, 2018–2019
    covers the oil pan, differential and transfer case; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.26.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.25.
    		Factory-verified
    VAV LPO, All-weather floor mats, front and rear 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.17.
    		Factory-verified
    RWS LPO, Carpeted floor mats, front and rear 2015
    dealer-installed; Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    		Factory-verified
    S0P LPO, Console insert organizer tray 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.17.
    		Factory-verified
    VKW LPO, Console insert expandable folder tote 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.18.
    		Factory-verified
    SYT LPO, Sill plates, premium 2015
    dealer-installed; Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    		Factory-verified
    VBJ LPO, Rear underseat storage bin, composite 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.18.
    		Factory-verified
    RIA LPO, All-weather floor liner 2018–2019
    dealer-installed; 2019 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.17.
    		Factory-verified
    UJ5 LPO, Rear seat DVD entertainment system, dual 7 inch headrest monitors 2018–2019
    dealer-installed; not with the factory entertainment package (U42); 2019 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.18.
    		Factory-verified
    VXH LPO, Assist steps, chrome tubular, 6 inch rectangular 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.22.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.20.
    		Factory-verified
    VXJ LPO, Assist steps, chrome tubular, 4 inch round 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.22.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.20.
    		Factory-verified
    RVQ LPO, Assist steps, black tubular, 6 inch rectangular 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.22.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.20.
    		Factory-verified
    RVS LPO, Assist steps, black tubular, 4 inch round 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.22.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.20.
    		Factory-verified
    SF6 LPO, Wheel arch moldings, body-color 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.22.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.21.
    		Factory-verified
    S6V LPO, Cargo box side assist step, retractable 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.23.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.21.
    		Factory-verified
    RWI LPO, Bodyside moldings, chrome 2015
    dealer-installed; Sierra: O; SLE, SLT: not offered
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    VQL LPO, Fuel door, chrome 2015
    dealer-installed; Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    SDA LPO, Recovery hooks, chrome 2015
    dealer-installed; Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    VQZ LPO, Exhaust tip, polished 2015, 2018–2019
    dealer-installed; gasoline engine; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.23.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.21.
    		Factory-verified
    VQK LPO, Splash guards, molded, black, front and rear 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.23.
    		Factory-verified
    SB1 LPO, Splash guards, flat, black 2015
    dealer-installed; Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    VRV LPO, Splash guards, molded, body-color 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.23.
    		Factory-verified
    5JY LPO, Tonneau cover, soft folding 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.23.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.21.
    		Factory-verified
    VPB LPO, Tonneau cover, vinyl, integrated support bows 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.23.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.22.
    		Factory-verified
    VQT LPO, Tonneau cover, hard tri-folding, vinyl covered 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.23.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.22.
    		Factory-verified
    VZX LPO, Bedliner 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.22.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.20.
    		Factory-verified
    VBN LPO, Bed rug 2015
    dealer-installed; Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    VBR LPO, Bed mat, rubber 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.22.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.21.
    		Factory-verified
    SCZ LPO, Tailgate handle, chrome 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE: not offered; SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.23.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.22.
    		Factory-verified
    VUK LPO, Tailgate liner 2015
    dealer-installed; Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    RW6 LPO, Bed storage box, metal 2015
    dealer-installed; Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    RXQ LPO, Bed net 2015
    dealer-installed; Sierra, SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    SFE LPO, Wheel locks, set of 4 2015, 2018–2019
    dealer-installed; 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.23.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.22.
    		Factory-verified
    SB7 LPO, Bedside decal, Z71 2015
    dealer-installed; requires the off-road suspension package (Z71); Sierra: not offered; SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    SB9 LPO, Bedside decal, 4x4 2015
    dealer-installed; 4WD; Sierra: not offered; SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    SF8 LPO, Bedside decal, Z71 4x4 2015
    dealer-installed; 4WD with the off-road suspension package (Z71); Sierra: not offered; SLE, SLT: O
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
    		Factory-verified
    Paint
    G1K Stone Blue Metallic 2015, 2018–2019
    touch-up paint WA-409Y; extra charge; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.57.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.54.
    		Factory-verified
    G7J Emerald Green Metallic 2015
    touch-up paint WA-136X; extra charge; not with the All Terrain HD package (GAT)
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    		Factory-verified
    GAN Quicksilver Metallic 2015, 2018–2019
    touch-up paint WA-636R; not with the All Terrain HD package (GAT) in 2015; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.57.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.54.
    		Factory-verified
    GAZ Summit White 2015, 2018–2019
    touch-up paint WA-8624; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.57.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.54.
    		Factory-verified
    GBA Onyx Black 2015, 2018–2019
    touch-up paint WA-8555; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.57.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.54.
    		Factory-verified
    GCE Sonoma Red Metallic 2015
    touch-up paint WA-412P
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    		Factory-verified
    GCN Fire Red 2015
    touch-up paint WA-9260; not with the All Terrain HD package (GAT)
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    		Factory-verified
    GWX Bronze Alloy Metallic 2015
    touch-up paint WA-105V
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    		Factory-verified
    GXG Iridium Metallic 2015
    touch-up paint WA-121V
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    		Factory-verified
    Interior Trim
    H2R Interior trim, Dark Ash seats with Jet Black accents, cloth, split-bench 2015, 2018–2019
    Sierra (1SA) 40/20/40 split-bench (AE7); 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.55.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.52.
    		Factory-verified
    H2Q Interior trim, Dark Ash seats with Jet Black accents, vinyl 2015, 2018–2019
    Sierra (1SA) 40/20/40 split-bench (AE7); 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.55.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.52.
    		Factory-verified
    H0U Interior trim, Jet Black, cloth 2015, 2018–2019
    SLE (3SA) split-bench (AZ3) and bucket seats (A95); 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.55.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.52.
    		Factory-verified
    H2S Interior trim, Dark Ash seats with Jet Black accents, cloth, SLE seats 2015, 2018–2019
    SLE (3SA) split-bench (AZ3) and bucket seats (A95); 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.55.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.52.
    		Factory-verified
    H2T Interior trim, Cocoa / Dune, cloth 2015, 2018–2019
    SLE (3SA) split-bench (AZ3) and bucket seats (A95); 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.55.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.52.
    		Factory-verified
    H2Z Interior trim, Jet Black / Spice Red, cloth 2015
    SLE (3SA) bucket seats (A95); requires the All Terrain HD package (GAT)
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
    		Factory-verified
    H1Y Interior trim, Jet Black, leather-appointed 2015, 2018–2019
    SLE (3SA) leather split-bench (AZ3); every year rests on the requirement remark of the leather split-bench seat option, "Requires (AZ3) 40/20/40 split bench front seat and (H1Y) Jet Black leather appointed interior trim" (rule 11(b)); the color and trim pages print only the footnote-digit forms (2015 H1Y2; 2018 H1Y1 and H1Y3), so no page prints the bare code as a trim line
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.16.
    GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
    		Factory-verified
    Internal / Process
    FE9 internal Emissions, federal requirements 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.24.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.22.
    		Factory-verified
    NE1 internal Emissions, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington requirements 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.24.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.22.
    		Factory-verified
    YF5 internal Emissions, California state requirements 2015, 2018–2019
    2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.25.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.23.
    		Factory-verified
    NC7 internal Emissions override, federal 2015, 2018–2019
    ; for dealers in states with YF5 or NE1 emissions; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.24.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.23.
    		Factory-verified
    NB9 internal Emissions override, state-specific 2015, 2018–2019
    ; lets dealers swap between YF5 and NE1 emissions; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.25.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.23.
    		Factory-verified
    NB8 internal Emissions override, California 2015, 2018–2019
    lets dealers in California-emission states order federal emissions; not in Maine or Vermont; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
    GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
    GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.25.
    GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.23.
    		Factory-verified

    Source document: gmc/sierra-hd-k2xx.md. Rows marked — record an option the factory offered whose RPO code is not documented in the consulted sources.