Differential, rear, driver-selectable, electronically locking

Years 2023–27 Models 6 Factory citations 21

Also described as Axle, rear, electronic locking differential, driver selectDifferential, rear, driver-selectable full-locking, e-lockingDifferential, rear, driver-selectable full-locking

Also documented for Chevrolet Hummer

Documented applications

Canyon — Third generation (VSS-T) (2023–2027)

2023–2027 Factory-verified

2025: AT4: O; Elevation, Denali: not offered; 2026–2027: AT4X: S; Elevation, AT4, Denali: not offered

GM factory document — 2023 gmc 23canyon electrical body builder 2023march13, p.10.
GM factory document — 2024 gmc 24 canyon electrical body builder manual 2023oct04, p.11.
GM factory document — 2025 gmc canyon fleet order guide, p.39.
GM factory document — 2026 gmc canyon fleet order guide, p.8.
GM factory document — 2027 gmc canyon fleet order guide, p.8.

Hummer EV Pickup (2022–2027)

2024–2026 Factory-verified

only with Z6X; 2024: GM Authority 2024 changes page

GM factory document — 2025 gmc hummer ev pickup fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc hummer ev pickup fleet order guide rpo codes, p.1.
GM factory document — 2025 gmc hummer ev pickup fleet order guide, p.24.
GM factory document — 2026 gmc hummer ev pickup fleet order guide, p.30.

Hummer EV SUV — BT1 (2024–2027)

2025–2026 Factory-verified

available only with the Extreme Off-Road Package (Z6X). 2025: O in 1SF, 1SG; 2026: O in 1SF, 1SG; not offered in 3VL.

GM factory document — 2025 gmc hummer ev suv fleet order guide, p.22.
GM factory document — 2026 gmc hummer ev suv fleet order guide, p.26.

Sierra 1500 — Next-Generation (2027)

2027 Factory-verified

Pro, Elevation, AT4, Denali, Denali Ultimate: not offered; AT4X: included in the trim group

GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.22.
GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Sierra HD — T1XX (2020–2027)

2025–2027 Factory-verified

only in: 2500 HD; AT4X: S in the 2025 and 2026 guides, included in the trim group in the 2027 guides; the other trims are not offered

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 — T1XX (2019–2026)

2023–2026 Factory-verified

the upfitter lists read "Axle, rear, electronic locking differential, driver select"

GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.11.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.13.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.11.
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.

This page aggregates every documented appearance of G94 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.