Transmission, 10-speed automatic (10L80, Gen 1)

Years 2022–27 Models 4 Factory citations 17

Also described as Transmission, 10 speed automatic, with Electronic Precision ShiftTransmission, 10 speed automatic, electronic transmission range selector

Also documented for Cadillac Chevrolet

Documented applications

Sierra 1500 — Next-Generation (2027)

2027 Factory-verified

Pro, Elevation 3SB, AT4X: O; Elevation 3VL: not offered; AT4, Denali, Denali Ultimate: included in the trim group, upgradeable; electronically controlled with overdrive, tow/haul mode and steering column paddle shifters; includes cruise grade braking and powertrain grade braking; paired with the L76 and L78 V8s

GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.24.
GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Sierra — T1XX (2019–2026)

2023–2026 Factory-verified

10L80, GRX, Gen 1, ATSS, variation 1

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 — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: S on all trims

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.11.
GM factory document — 2026 gmc yukon denali fleet order guide, p.11.
GM factory document — 2027 gmc yukon fleet order guide, p.11.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: S on all trims

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.11.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.11.
GM factory document — 2027 gmc yukon xl fleet order guide, p.11.

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