NHT Factory-verified

GMC · Regular Production Option

Performance package, enhanced towing

Years 2006–07, 2009, 2014–20, 2022–27 Models 12 Factory citations 47

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Also described as Max Trailering PackageEnhanced towing performance packageMax trailering packageMax Trailering packageHD Trailering package

Also documented for Cadillac Chevrolet

Documented applications

Savana — GMT610 (2003–2027)

2017–2018, 2022–2027 Factory-verified

the 2025–2027 guides read Enhanced Towing Performance Package and raise the gross combined weight rating to 20,000 lbs (9072 kg); O: Cutaway TG33803, Cutaway TG33903 (2025–2026); not offered: Cutaway 2WT (2025–2026), Cutaway TG33503; in the 2025–2027 guides only in the Cutaway guides

GM factory document — 2017 chevrolet express savana electrical body builders manual service manual 2017 en us, p.9.
GM factory document — 2018 chevrolet 18 express savana bodybuilders sm 2017nov06, p.16.
GM factory document — 2022 chevrolet 22 express savana electrical body builder sm en us 2021oct12, p.13.
GM factory document — 2025 chevrolet my25 express savana electrical bbm, p.12.
GM factory document — 2025 gmc savana cutaway fleet order guide, p.39.
GM factory document — 2026 chevrolet my26 express savana electrical bbm, p.12.
GM factory document — 2026 gmc savana cutaway fleet order guide, p.42.
GM factory document — 2027 gmc savana cutaway fleet order guide, p.21.

Sierra 1500 — Next-Generation (2027)

2027 Factory-verified

includes V03

GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.41.
GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Sierra — GMT800 (1999–2007)

2006–2007 Factory-verified

GM factory document — 2006 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2007 gmc sierra classic 2wd rpo code list, p.1.

Sierra — GMT900 (2007–2013)

2009 Factory-verified

GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.

Sierra HD — T1XX (2020–2027)

2024–2027 Factory-verified

only in: 2500 HD and 3500 HD pickup; 2500 HD: includes 3500 HD frame, leaf springs, 12 inch rear axle and shock package, spray-on bedliner (CGN) and gooseneck / 5th wheel prep (Z6A); 3500 HD pickup: includes F60, Q21 wheels, QHY tires and Z6A, without the bedliner; 2024: GM Authority 2024 changes page (2500 models)

GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.

Sierra — K2XX (2014–2019)

2014, 2016–2018 Factory-verified

GM factory document — 2014 gmc sierra 1500 fleet order guide wayback, p.4.
GM factory document — 2016 gmc sierra 1500 fleet order guide wayback, p.4.
GM factory document — 2017 chevrolet sierra silverado electrical body builders manual service manual 2017 en us, p.24.
GM factory document — 2018 gmc sierra 1500 order guide copy gm authority, p.89.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2026 Factory-verified

the upfitter lists read "Performance package, enhanced towing"; the 2024–2025 lists print its contents under the code (limited-slip axle, 3.42 or 3.73 rear axle, integrated trailer brake)

GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.12.
GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.13.
GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.12.
GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.12.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.14.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.12.
GM factory document — 2025 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Yukon — GMT900 (2007–2014)

2009 Factory-verified

GM factory document — 2009 gmc yukon 2wd rpo code list, p.1.

Yukon — K2XX (2015–2020)

2015–2018 Factory-verified

SLE, SLT: A; Denali: not offered; includes GU6, JL1, Z85 and NQH on 4WD; the lists read performance package, enhanced towing; 2018 from GM's 2018 Yukon order guide

GM factory document — 2015 gmc yukon denali fleet order guide wayback, p.4.
GM factory document — 2016 gmc yukon denali fleet order guide wayback, p.4.
GM factory document — 2017 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2017 en us 1, p.24.
GM factory document — 2018 gmc yukon order guide copy gm authority, p.34.

Yukon — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: AT4 Ultimate, Denali Ultimate: S; Elevation, AT4, Denali: O; includes UKW, PZ8, UET, JL1, V03

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.11.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.11.
GM factory document — 2025 gmc new yukon denali fleet order guide, p.18.
GM factory document — 2026 gmc yukon denali fleet order guide, p.19.
GM factory document — 2027 gmc yukon fleet order guide, p.17.

Yukon XL — K2XX (2015–2020)

2015–2017 Factory-verified

SLE, SLT: A; Denali: not available; includes GU6, JL1, Z85 and, on 4WD, NQH; the lists read performance package, enhanced towing

GM factory document — 2015 gmc yukon xl denali fleet order guide wayback, p.4.
GM factory document — 2016 gmc yukon xl denali fleet order guide wayback, p.4.
GM factory document — 2016 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2016 en us, p.11.
GM factory document — 2017 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2017 en us 1, p.24.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: AT4 Ultimate, Denali Ultimate: S; Elevation, AT4, Denali: O; includes UKW, PZ8, UET, JL1, V03

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.11.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.11.
GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.18.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.19.
GM factory document — 2027 gmc yukon xl fleet order guide, p.17.

This page aggregates every documented appearance of NHT in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.