- 2025–2027 Factory-verified
S on all trims
A2X Factory-verified
Also described as Seat adjuster, driver 8-way powerSeat adjuster, driver, 12 way power including 4 way lumbarSeat adjuster, driver power, 10-way, including lumbarSeat adjuster, driver 10-way power including lumbarSeat adjuster, driver 12-way power including lumbarSeat adjuster, driver 16-way power including lumbar and massageSeat adjuster, driver, 10-way power with lumbarDriver seat, 8-way power
Also documented for BuickCadillacChevrolet
Documented applications
- 2023–2027 Factory-verified
2025: Elevation: O; AT4, Denali: included in a package; 2026–2027: Elevation: O; AT4, AT4X, Denali: included in a package
- 2025–2026 Factory-verified
- 2025–2026 Factory-verified
- 2025–2027 Factory-verified
the 2025 guide prints "with 4-way power lumbar"; the rpo-code list prints only "Seat adjuster"
- 2027 Factory-verified
Pro: O; AT4, Elevation, AT4X, Denali, Denali Ultimate: included in the trim group; the code list prints driver power; 10-way and lumbar from the Convenience Plus Package (Z65) contents
- 2025–2027 Factory-verified
this code has another meaning in two other A2X rows (the guides print the 10, 12 and 16-way readings); SLT, AT4: S; Pro, SLE: O, requires Jet Black interior trim (H0U) and the convenience package (PCI or ZLQ); AT4X, Denali, Denali Ultimate: not offered
- 2025–2027 Factory-verified
this code has another meaning in two other A2X rows (the guides print the 10, 12 and 16-way readings); Denali: S; Pro, SLE, SLT, AT4, AT4X, Denali Ultimate: not offered
- 2024–2027 Factory-verified
this code has another meaning in two other A2X rows (the guides print the 10, 12 and 16-way readings); AT4X, Denali Ultimate: S; Pro, SLE, SLT, AT4, Denali: not offered; 2024: GM Authority 2024 changes page (16-way power seats with massage, standard on AT4X and Denali Ultimate)
- 2019–2020, 2022–2026 Factory-verified
the upfitter lists describe the 8-way power adjuster (recline, fore/aft, height, tilt); the 2025–2026 guides count the lumbar as 10-way
- 2025–2027 Factory-verified
S: AT4 (from 2026), Denali (from 2026); O: Elevation; on Elevation it is part of ZQ3 (Convenience Package II), which GHI includes
- 2022–2023, 2025–2027 Factory-verified
2027: S on all trims
- 2022–2023, 2025–2027 Factory-verified
2027: S on all trims
This page aggregates every documented appearance of A2X in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.