Buick Envista — VSS-F (2024–2027)

The first-generation Buick Envista is a subcompact crossover SUV on GM's VSS-F platform, sold in North America from the 2024 model year in front-wheel-drive Preferred, Sport Touring and Avenir trims, with a turbocharged 1.2L three-cylinder engine (LIH in 2024, LBP from 2025) and a 6 speed automatic (MNH). The 2025 and 2026 GM Fleet Order Guides supply the factory rows; 2026 adds the Studio Series package and Ceramic paint. Gaps: no GM document for 2024 or 2027 was found, so those years rest on GM Authority (2027 is described there as a carry-over year with the same engine, transmission and axle). The NICB VIN manuals show the same three trims for 2024, 2025 and 2026.

Codes

Engines

Code	Description	Years	Models/Notes	Confidence
K1O	Engine, air filtration monitor	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
KL9	Engine control, stop/start system	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
LBP	Engine, Ecotec 1.2L turbo, DOHC, direct injection, variable valve timing	2025–2027	all trims: S; GM Authority lists LBP on its 2026 and 2027 pages (2027 carries over) and LIH for 2024 ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
LIH	Engine, 1.2L turbo, three cylinder, DOHC, direct injection	2024	2024 only: GM Authority's 2024 specifications page prints LIH as the engine code; the 2025 and later GM lists print LBP	confirmed

Transmissions

Code	Description	Years	Models/Notes	Confidence
MNH	Transmission, 6 speed automatic	2024–2027	all trims: S; 2024 and 2027 from GM Authority (its 2024 specifications page prints MNH for the Hydra-Matic 6T40; its 2027 page says the transmission carries over from 2026 and prints the code as MHN) ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed

Axles

Code	Description	Years	Models/Notes	Confidence
FJM	Axle, 3.50 final drive ratio	2025–2026	all trims: S; GM Authority gives a 3.50 axle ratio for 2024 and 2027 without printing a code ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
FWD	Drive, front-wheel	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed

Packages & Trims

Code	Description	Years	Models/Notes	Confidence
G02	Preferred trim group	2025–2026	column heading of the guides' equipment pages (4TQ58 Preferred) ⛭ GM factory document — 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
G03	Sport Touring trim group	2025–2026	column heading of the guides' equipment pages (4TR58 Sport Touring) ⛭ GM factory document — 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
G04	Avenir trim group	2025–2026	column heading of the guides' equipment pages (4TS58 Avenir) ⛭ GM factory document — 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
PCJ	Experience Buick Package	2025	Sport Touring: O; includes power moonroof (CAC), 19" black painted aluminum wheels (RVB) and Watts link rear suspension (GNG); the 2025 guide marks it no longer available to order ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9	confirmed
PCR	LPO, Interior floor liner package	2026	all trims: O; includes LPO all-weather floor liners (RIA) and LPO cargo liner (CAV); not with LPO all-weather floor mats (VAV), and Sport Touring cannot add it with Studio Series (WFP) ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.8	confirmed
PDC	Buick Driver Confidence	2025–2026	all trims: S; includes Automatic Emergency Braking (UHY), Front Pedestrian Braking (UKJ), Forward Collision Alert (UEU), Following Distance Indicator (UE4), Lane Keep Assist with Lane Departure Warning (UHX) and IntelliBeam (TQ5) ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
WFP	Studio Series	2026	Sport Touring: O; includes Ceramic paint (G42), Whisper Beige stitched interior (HIH), 19" black wheels (RVB), power moonroof (CAC), Watts link rear suspension (GNG), Convenience I and II and Advanced Safety packages (ZL4, ZQ2, WPA), LPO all-weather floor liners (RIA) and LPO sport pedal kit (SBZ); retail order types only ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.9	confirmed
WPA	Advanced Safety Package	2025–2026	Preferred, Sport Touring: O; includes Adaptive Cruise Control (KSG), Lane Change Alert with Side Blind Zone Alert (UKC) and Rear Cross Traffic Alert (UFG); included with Studio Series in 2026 ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.8	confirmed
WPP	Avenir Advanced Safety Package	2025–2026	Avenir: O; includes Adaptive Cruise Control (KSG), Lane Change Alert with Side Blind Zone Alert (UKC), Rear Cross Traffic Alert (UFG), heated power outside mirrors with turn signal indicators and driver-side auto-dimming (DXZ) and Rainsense wipers (CE1) ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.8	confirmed
ZL4	Convenience I Package	2025–2026	Preferred, Sport Touring: O; includes driver 8-way power seat adjuster (A2X), 2-way power driver lumbar control (AL9), heated front seats (KA1), heated steering wheel (UVD) and Keyless Open (AVJ), plus wrapped flat-bottom steering wheel (N5E) on Preferred; included with Studio Series in 2026 ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.8	confirmed
ZQ2	Convenience II Package	2025–2026	Preferred, Sport Touring: O; includes Wireless Charging (K4C), power liftgate (TB5) and Rainsense front wipers (CE1); included with Studio Series in 2026 ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.8	confirmed

Equipment

Code	Description	Years	Models/Notes	Confidence
5H1	Key system, 2 keys	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
A2V	Seat adjuster, driver 6-way manual	2025–2026	Preferred, Sport Touring: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
A2X	Seat adjuster, driver 8-way power	2025–2026	Preferred, Sport Touring: O; Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
A50	Seats, front bucket	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
A64	Seat, rear 40/60 split-bench, folding, 60 percent on passenger side	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
A7E	Seat adjuster, front passenger 4-way manual	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
AAL	Knee bolster, driver and front passenger	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
AEC	Window, power, driver with Express-Down	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
AED	Window, power, front passenger with Express-Down	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
AEQ	Windows, power, rear with Express-Down	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
AJC	Head restraints, front, up and down adjustment	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
AKK	Glass, acoustic, laminated windshield	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
AKO	Glass, deep-tinted	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
AKW	Glass, tinted windshield	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
AL9	Seat adjuster, 2-way power driver lumbar control	2025–2026	Preferred, Sport Touring: O; Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
AQY	Head restraints, rear, height adjustable	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
ASV	Sensor, cabin humidity	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
AU3	Door locks, power	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
AVJ	Keyless Open, front doors, includes extended range Remote Keyless Entry	2025–2026	Preferred, Sport Touring: O; Avenir: S; only with Convenience I Package (ZL4) where optional ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
AY0	Airbags, frontal and seat-mounted side-impact for driver and front passenger, roof rail-mounted head-curtain for all outboard seating positions, passenger sensing system for front passenger	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
B34	Floor mats, carpeted front	2025–2026	all trims: S; deleted when LPO floor liners or mats are ordered ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
B35	Floor mats, carpeted rear	2025–2026	all trims: S; deleted when LPO floor liners or mats are ordered ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
B70	Door sill plate cover, front	2025–2026	Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
B7S	Cargo security cover, rear, stowable under rear cargo load floor	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
B86	Moldings, body-color bodyside	2025–2026	Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
B87	Moldings, gloss Black bodyside	2025–2026	Sport Touring: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
BAH	Theft-deterrent system, immobilizer	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
BTM	Keyless Start, push-button	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
BTT	Remote panic alarm	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
BTV	Remote vehicle starter system	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
C2Y	GVWR, 4255 lbs. (1930 kg)	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
C35	HVAC duct, rear, underneath front seat	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
C49	Defogger, rear-window electric	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
C68	Air conditioning, single-zone automatic climate control	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
C91	Lighting, interior, overhead courtesy lamp	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
CAC	Moonroof, power, tilt-sliding with manual sunshade	2025–2026	Sport Touring, Avenir: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.9	confirmed
CAV	LPO, cargo liner	2025–2026	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.8	confirmed
CD4	Wipers, front intermittent	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
CE1	Wipers, front intermittent, Rainsense	2025–2026	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.18 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.20	confirmed
D31	Mirror, inside rearview manual day and night with tilt	2025–2026	Preferred, Sport Touring: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
D6I	Visors, driver and front passenger illuminated vanity mirrors, covered	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
D75	Door handles, body-color	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
DA1	Armrest, center, rear with cupholders	2025–2026	Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
DD8	Mirror, inside rearview auto-dimming	2025–2026	Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
DP6	Mirror caps, body-color	2025–2026	Preferred, Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
DU3	Console, floor, with armrest	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
DWK	Mirrors, outside heated, power-adjustable, manual-folding, with turn signal indicators	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
DXZ	Mirrors, outside heated, power-adjustable, manual-folding, driver-side	2025–2026	Avenir: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.18 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.20	confirmed
E22	Assist handles, rear outboard	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
E27	Assist handle, front passenger	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
E90	Map pocket, driver seatback	2025–2026	Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
E91	Map pocket, front passenger seatback	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
EWE	Mirror caps, high gloss Black	2025–2026	Sport Touring: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
FE2	Suspension, Ride and Handling	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
FX3	StabiliTrak, stability control system	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
GNA	Suspension, front MacPherson strut	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
GNF	Suspension, rear, compound crank	2025–2026	Preferred, Sport Touring: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
GNG	Suspension, rear, Watts Link System	2025–2026	Sport Touring: O; Avenir: S; requires 19" black wheels (RVB); included with Studio Series (WFP) in 2026 ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
IVA	Audio system, 11" diagonal HD color touchscreen, AM/FM stereo	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
J60	Brakes, 4-wheel antilock, 4-wheel disc	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
J71	Brake, electronic parking	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
K05	Engine block heater	2025–2026	all trims: O; includes front lower grille active shutters (VRI) ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.10 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.11	confirmed
K34	Cruise control, electronic with set and resume speed	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
K4C	Wireless Charging	2025–2026	Preferred, Sport Touring: O; Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
K4E	Battery, 70AH, 12 volt, 760 cold-cranking amps	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
K6J	Air filter, pollutant and fine dust	2025–2026	Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
KA1	Seats, heated driver and front passenger	2025–2026	Preferred, Sport Touring: O; Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
KB5	Hill Start Assist	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
KD4	Power outlet, 12 volt, located inside front console	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
KG8	Alternator, 130 amps	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
KI2	Shift knob, vinyl	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
KQX	Capless fuel fill	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
KSG	Adaptive Cruise Control	2025–2026	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.12 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.13	confirmed
MDB	Moldings, Black bodyside	2025–2026	Preferred: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
N37	Steering column, tilt and telescopic, adjustable	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
N45	Steering wheel, flat-bottom	2025–2026	Preferred: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
N5E	Steering wheel, wrapped, flat-bottom	2025–2026	Preferred: O; Sport Touring, Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
NJ1	Steering, power, non-variable ratio, electric	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
NKC	Noise control system, active noise cancellation	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
NWN	Exhaust tip, turned down, hidden	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
P0H	OnStar Connect Plus, 12 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.28	confirmed
P0I	OnStar Connect Plus, 24 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.29	confirmed
PQG	OnStar Connect Plus, 36 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.29	confirmed
PQH	OnStar Connect Plus, 48 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.29	confirmed
PQI	OnStar Connect Plus, 60 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.30	confirmed
P0U	OnStar Protect, 12 months	2025–2026	all trims: O; the 2025 list calls it OnStar Security, 12 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.22 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.24	confirmed
P0J	OnStar Protect, 24 months	2025–2026	all trims: O; the 2025 list calls it OnStar Security, 24 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.22 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.24	confirmed
P0K	OnStar Protect, 36 months	2025–2026	all trims: O; the 2025 list calls it OnStar Security, 36 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.23 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.24	confirmed
P0L	OnStar Protect, 48 months	2025–2026	all trims: O; the 2025 list calls it OnStar Security, 48 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.23 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.24	confirmed
P0Q	OnStar Protect, 60 months	2025–2026	all trims: O; the 2025 list calls it OnStar Security, 60 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.24 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.25	confirmed
P0V	OnStar Telematics, 12 months	2025–2026	all trims: O; the 2025 list calls it OnStar Insights, 12 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.24 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.27	confirmed
P0W	OnStar Telematics, 24 months	2025–2026	all trims: O; the 2025 list calls it OnStar Insights, 24 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.24 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.27	confirmed
P0X	OnStar Telematics, 36 months	2025–2026	all trims: O; the 2025 list calls it OnStar Insights, 36 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.25 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.27	confirmed
P0Y	OnStar Telematics, 48 months	2025–2026	all trims: O; the 2025 list calls it OnStar Insights, 48 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.25 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.28	confirmed
P0Z	OnStar Telematics, 60 months	2025–2026	all trims: O; the 2025 list calls it OnStar Insights, 60 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.25 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.28	confirmed
PQL	OnStar Video Telematics with hardware, 12 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.30	confirmed
PQM	OnStar Video Telematics with hardware, 24 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.30	confirmed
PQP	OnStar Video Telematics with hardware, 36 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.31	confirmed
PQQ	OnStar Video Telematics with hardware, 48 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.31	confirmed
PQT	OnStar Video Telematics with hardware, 60 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.32	confirmed
R8G	OnStar One Fleet, 12 months	2025–2026	all trims: O; the 2025 list calls it OnStar One Business Plus, 12 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.26 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.25	confirmed
RFH	OnStar One Fleet, 24 months	2025–2026	all trims: O; the 2025 list calls it OnStar One Business Plus, 24 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.26 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.25	confirmed
R8P	OnStar One Fleet, 36 months	2025–2026	all trims: O; the 2025 list calls it OnStar One Business Plus, 36 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.26 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.26	confirmed
R8Z	OnStar One Fleet, 48 months	2025–2026	all trims: O; the 2025 list calls it OnStar One Business Plus, 48 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.27 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.26	confirmed
R8W	OnStar One Fleet, 60 months	2025–2026	all trims: O; the 2025 list calls it OnStar One Business Plus, 60 months of service ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.27 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.26	confirmed
PRB	OnStar One, 3 years	2026	Preferred, Sport Touring: O; requires OnStar and a TRE or SRE order type ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.9	confirmed
R9M	OnStar One, 3 years	2026	Avenir: S; requires OnStar ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
R9L	OnStar Basics, deleted (OnStar Fleet Basics for Fleet)	2025–2026	all trims: O; deletes OnStar standard services on vehicles shipped to Puerto Rico, the Virgin Islands or Guam; the 2026 list also gives this code another reading: removing the 3 years of OnStar One (next row) ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.14 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.16	confirmed
R9L	OnStar One, 3 years, removed	2026	Avenir: O; removes the 3 years of OnStar One (R9M) and the Super Cruise upgrade version; required on vehicles shipped to Puerto Rico, the Virgin Islands or Guam; the 2026 list gives this code another reading as well (the OnStar Basics deletion above); the 2025 list has only the Basics reading ⛭ GM factory document — 2026 buick envista fleet order guide, p.9, p.16	confirmed
P1N	API Pro, 12 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.35	confirmed
P1O	API Pro, 24 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.35	confirmed
P1P	API Pro, 36 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.36	confirmed
R7Z	API Pro, 6 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.34	confirmed
P1Q	API Elite, 6 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.36	confirmed
PRE	API Elite, 12 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.37	confirmed
PR6	API Elite, 24 months	2026	all trims: O; the 2025 list gives this code another reading ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.37	confirmed
PR6	SiriusXM, additional 9 months of the SXM Platinum Plan	2025	all trims: O; needs SiriusXM (U2K) and a fleet or government order type; the 2026 list gives this code another reading ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.27	confirmed
RFS	API Elite, 36 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.38	confirmed
P1R	API Starter, 6 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.32	confirmed
P1S	API Starter, 12 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.33	confirmed
P1T	API Starter, 24 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.33	confirmed
P1U	API Starter, 36 months	2026	all trims: O ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.34	confirmed
PR7	SiriusXM, additional 21 months of the SXM Platinum Plan	2025	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.27	confirmed
PR8	SiriusXM, additional 33 months of the SXM Platinum Plan	2025	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.27	confirmed
PPW	Wireless Apple CarPlay and wireless Android Auto	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
Q8E	Jack, mechanical, with tools	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
QA3	Tires, 225/60R17 all-season, blackwall	2025–2026	Preferred: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
QAI	Tires, 225/55R18 all-season, blackwall	2025–2026	Sport Touring: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
RH3	Tires, 245/45R19 all-season, blackwall	2025–2026	Sport Touring: O; Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
R6P	SiriusXM, 3 years	2025–2026	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.8	confirmed
R9V	MobileService+, 3 years	2025–2026	all trims: O; dealer service convenience plan (mobile service, pick-up and delivery, loaner); dealers with BFU 284 only ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.9	confirmed
R9Y	MobileService+, 1 year	2026	all trims: O; dealer service convenience plan; dealers with BFU 284 only ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.9	confirmed
R9W	MobileService+, deleted	2025–2026	all trims: O; dealers with BFU 284 only; TRE, SRE or fleet order types ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.9	confirmed
RDI	LPO, keyless entry keypad	2025–2026	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.10	confirmed
RIA	LPO, all-weather floor liners	2025–2026	all trims: O; not with LPO all-weather floor mats (VAV); replaces standard floor mats ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.8	confirmed
RSC	Wheels, 17" (43.2 cm) Bright Silver painted aluminum	2025–2026	Preferred: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
RSR	Rear Seat Reminder	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
RT8	Wheels, 19" (48.3 cm) Avenir Premium Pearl Nickel aluminum	2025–2026	Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
RVB	Wheels, 19" (48.3 cm) Black painted aluminum	2025–2026	Sport Touring: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.10	confirmed
SGE	Wheels, 18" (45.7 cm) Black painted aluminum	2025–2026	Sport Touring: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
RWU	LPO, cargo area organizer, collapsible	2025	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8	confirmed
S08	LPO, Highway Safety Kit	2025	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8	confirmed
SBZ	LPO, sport pedal kit	2025–2026	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.9	confirmed
SFE	LPO, wheel locks	2025–2026	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.10	confirmed
SJQ	Wheel, spare, 16" (40.6 cm) steel	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
T4L	Headlamps, LED	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
T7E	Daytime Running Lamps, Signature LED	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
T7Z	Buckle to Drive, prevents shifting out of Park until driver seat belt is fastened, programmable	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
T83	Headlamp control, automatic on and off	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
TB4	Liftgate, manual	2025–2026	Preferred, Sport Touring: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
TB5	Liftgate, power	2025–2026	Preferred, Sport Touring: O; Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
TDM	Teen Driver	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
TGE	Headlamp level, upper	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
TQ5	IntelliBeam, automatic high beam	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
TS6	Lamp, LED center high-mounted stop lamp	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
TUU	Lighting, interior, roof, rear courtesy	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
U04	Horn, single-note	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
U25	Lighting, rear cargo compartment lamp	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
U2K	SiriusXM trial subscription	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
UBI	USB ports, 2 type-C, located on back of center console, charge-only	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
UBJ	USB ports, 2, 1 USB Type-A and 1 USB Type-C, located in lower instrument panel	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
UC3	Steering wheel controls, mounted audio, cruise control, Driver Information Center, Forward Collision Alert gap adjust and phone interface	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
UD7	Rear Park Assist	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
UDZ	Display, trip computer	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
UE1	OnStar services capable	2025–2026	all trims: S; service plan required ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
UE4	Following Distance Indicator	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
UEU	Forward Collision Alert	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
UFG	Rear Cross Traffic Alert	2025–2026	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.14 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.16	confirmed
UGC	Lamps, turn signal indicators, front LED	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
UGE	Tail lamps, LED	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
UHX	Lane Keep Assist with Lane Departure Warning	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
UHY	Automatic Emergency Braking	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
UJM	Tire Pressure Monitoring System, manual learn	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
UKC	Lane Change Alert with Side Blind Zone Alert	2025–2026	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.13 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.14	confirmed
UKJ	Front Pedestrian Braking	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.6 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.6	confirmed
UMN	Speedometer, miles and kilometers, miles odometer	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
UQ3	Audio system feature, premium 6-speaker system	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.1 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.1	confirmed
UQL	LATCH system (Lower Anchors and Tethers for Children), second row	2025–2026	all trims: S; 2 lower anchors for the outboard seating positions and 3 top tether anchors for all 3 seating positions ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
URO	Driver Information Center, 8" diagonal fully digital color display, reconfigurable	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.2 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.2	confirmed
UTJ	Theft-deterrent system, electrical, unauthorized entry	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
UUQ	Antenna, roof-mounted shark fin	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
UUT	Tire Fill Alert	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
UVB	HD Rear Vision Camera	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
UVD	Steering wheel, heated	2025–2026	Preferred, Sport Touring: O; Avenir: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
VAV	LPO, all-weather floor mats	2025–2026	all trims: O; not with LPO all-weather floor liners (RIA); replaces standard floor mats ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.8	confirmed
VHM	Vehicle health management, advance warning of vehicle issues	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.4 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.4	confirmed
VJQ	Recovery hook, front	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed
VK3	License plate bracket, front	2025–2026	all trims: O; forced on orders shipping to states that require a front plate ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.10	confirmed
VRI	Shutters, front lower grille, active	2025–2026	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.18 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.20	confirmed
VRV	LPO, front and rear splash guards	2025–2026	Avenir: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.10	confirmed
VV4	Wi-Fi Hotspot capable	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.3 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.3	confirmed
VYW	LPO, floor mats, premium carpeted	2025	all trims: O; the 2025 guide marks it not available at this time ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8	confirmed
W2D	LPO, vertical cargo net	2025–2026	all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.8 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.8	confirmed
ZDC	Tire, compact spare 16" (40.3 cm), located under cargo floor	2025–2026	all trims: S ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.5 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.5	confirmed

Paint

Code	Description	Years	Models/Notes	Confidence
G42	Ceramic	2026	only with Studio Series (WFP) ⛭ GM factory document — 2026 buick envista fleet order guide, p.23	confirmed
G98	Copper Ice Metallic	2024–2026	extra cost on Preferred; not available on Sport Touring; the 2026 guide marks it no longer available to order; 2024 from GM Authority's list of 2024 Envista paint colors ⛭ GM factory document — 2025 buick envista fleet order guide, p.21 · 2026 buick envista fleet order guide, p.23	confirmed
GAS	Brilliant Red	2026	extra cost on Preferred and Sport Touring ⛭ GM factory document — 2026 buick envista fleet order guide, p.23	confirmed
GAZ	Summit White	2024–2026	not available on Avenir; 2024 from GM Authority's list of 2024 Envista paint colors ⛭ GM factory document — 2025 buick envista fleet order guide, p.21 · 2026 buick envista fleet order guide, p.23	confirmed
GB0	Ebony Twilight Metallic	2024–2026	extra cost on Preferred and Sport Touring; 2024 from GM Authority's list of 2024 Envista paint colors ⛭ GM factory document — 2025 buick envista fleet order guide, p.21 · 2026 buick envista fleet order guide, p.23	confirmed
GFM	Cinnabar Metallic	2024–2025	extra cost on Preferred and Sport Touring; the 2025 guide says it was built out for the model year; 2024 from GM Authority's list of 2024 Envista paint colors ⛭ GM factory document — 2025 buick envista fleet order guide, p.21	confirmed
GK9	Ocean Blue Metallic	2024–2026	extra cost on Preferred and Sport Touring; the 2026 guide marks it no longer available to order; 2024 from GM Authority's list of 2024 Envista paint colors ⛭ GM factory document — 2025 buick envista fleet order guide, p.21 · 2026 buick envista fleet order guide, p.23	confirmed
GKN	Aquamarine Blue Metallic	2025–2026	extra cost; Sport Touring only; the 2026 guide says it is not available to order ⛭ GM factory document — 2025 buick envista fleet order guide, p.21 · 2026 buick envista fleet order guide, p.23	confirmed
GMF	Sunrise Red Metallic	2024	2024 only, from GM Authority: not available on Avenir	confirmed
GP5	White Frost Tricoat	2024–2026	extra cost; Avenir only; the 2026 guide marks it no longer available to order; GM Authority's 2026 colors article prints this color as GE8 in its text and GP5 in its image names; 2024 from GM Authority's list of 2024 Envista paint colors ⛭ GM factory document — 2025 buick envista fleet order guide, p.21 · 2026 buick envista fleet order guide, p.23	confirmed
GZB	Moonstone Gray Metallic	2024–2026	extra cost on Preferred and Sport Touring; 2024 from GM Authority's list of 2024 Envista paint colors ⛭ GM factory document — 2025 buick envista fleet order guide, p.21 · 2026 buick envista fleet order guide, p.23	confirmed

Interior Trim

Code	Description	Years	Models/Notes	Confidence
HWN	Seats, cloth with leatherette trim, Ebony seats and interior	2025–2026	Preferred ⛭ GM factory document — 2025 buick envista fleet order guide, p.21 · 2026 buick envista fleet order guide, p.23	confirmed
H5E	Seats, cloth with leatherette trim, Ebony seats and interior with Slate accents	2025–2026	Preferred; the 2026 guide marks it not available to order ⛭ GM factory document — 2025 buick envista fleet order guide, p.21 · 2026 buick envista fleet order guide, p.23	confirmed
HPI	Seats, leatherette trim, Ebony seats and interior with Santorini Blue stitching	2025–2026	Sport Touring ⛭ GM factory document — 2025 buick envista fleet order guide, p.21 · 2026 buick envista fleet order guide, p.23	confirmed
HIH	Seats, leatherette trim, Ebony seats and interior with Whisper Beige stitching	2026	Sport Touring; included with and only available with Studio Series (WFP) ⛭ GM factory document — 2026 buick envista fleet order guide, p.23	confirmed
H2U	Seats, perforated leather-appointed trim, Ebony seats and interior with Terracotta stitching	2025–2026	Avenir ⛭ GM factory document — 2025 buick envista fleet order guide, p.21 · 2026 buick envista fleet order guide, p.23	confirmed
H6A	Seats, perforated leather-appointed trim, Pebble Gray seats with Ebony interior and Whisper Beige stitching	2025–2026	Avenir ⛭ GM factory document — 2025 buick envista fleet order guide, p.21 · 2026 buick envista fleet order guide, p.23	confirmed

Internal / Process

Code	Description	Years	Models/Notes	Confidence
FE9	Emissions, Federal requirements	2025–2026	internal code; all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.10	confirmed
NB8	Emissions override, California	2025–2026	internal code; all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.10	confirmed
NB9	Emissions override, state-specific	2025–2026	internal code; all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.10 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.10	confirmed
NC7	Emissions override, Federal	2025–2026	internal code; all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.10 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.10	confirmed
NE1	Emissions, Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Virginia and Washington state requirements	2025–2026	internal code; all trims: O; the 2025 list names those states; the 2026 list prints only "Emissions" for the code ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.10	confirmed
YF5	Emissions, California state requirements	2025–2026	internal code; all trims: O ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1 · 2025 buick envista fleet order guide, p.9 · 2026 buick envista fleet order guide rpo codes, p.1 · 2026 buick envista fleet order guide, p.10	confirmed

Sources

Factory documents (T1)

buick/2025-buick-envista-fleet-order-guide.txt — 2025 Buick Envista — GM Fleet Order Guide (Print All), published July 18, 2025
buick/2025-buick-envista-fleet-order-guide-rpo-codes.txt — 2025 Buick Envista — GM Fleet Order Guide, RPO Codes
buick/2026-buick-envista-fleet-order-guide.txt — 2026 Buick Envista — GM Fleet Order Guide (Print All), published September 25, 2026
buick/2026-buick-envista-fleet-order-guide-rpo-codes.txt — 2026 Buick Envista — GM Fleet Order Guide, RPO Codes

Other sources

NICB VIN manuals: nicb2024-gm.txt p.159, nicb2025-gm.txt, nicb2026-gm.txt p.145 (Envista Preferred, Sport Touring and Avenir, front-wheel drive; VIN characters LA, LB, LC); no network use
https://gmauthority.com/blog/gm/buick/envista/2027-buick-envista/ — read 2026-10-07 through the Firecrawl CLI (direct fetches of gmauthority.com return HTTP 403); no login wall, CAPTCHA or terms forbidding automated access; 2027 carry-over and the LBP engine, 6 speed automatic and 3.50 axle
https://gmauthority.com/blog/gm/buick/envista/2024-buick-envista/ — read 2026-10-07 through Firecrawl; first model year, trims, production
https://gmauthority.com/blog/gm/buick/envista/2024-buick-envista/2024-buick-envista-specifications/ — read 2026-10-07 through Firecrawl; 2024 engine LIH and transmission MNH
https://gmauthority.com/blog/2023/04/here-are-all-the-2024-buick-envista-paint-colors/ — read 2026-10-07 through Firecrawl; 2024 paint codes
https://gmauthority.com/blog/2025/12/here-are-the-2026-buick-envista-colors/ — read 2026-10-07 through Firecrawl; 2026 paint codes (it prints White Frost Tricoat as GE8, not GP5)
https://gmauthority.com/blog/gm/buick/envista/2026-buick-envista/ — read 2026-10-07 through Firecrawl; 2026 engine and transmission
https://gmauthority.com/blog/2026/09/these-two-2026-buick-envista-paint-colors-are-no-longer-available-to-order/ — read 2026-10-07 through Firecrawl; G98 and GK9 offered since 2024
https://en.wikipedia.org/wiki/Buick_Envista — read 2026-10-07 by direct fetch; trims, model years 2024 onward in North America, VSS-F platform