Trailering assist guidelines

Years 2022–23, 2025–27 Models 4 Factory citations 13

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Also described as Trailering assist, reverse

Also documented for Cadillac Chevrolet

Documented applications

Sierra EV — BT1 (2024–2027)

2025 Factory-verified

included with and only available with ZL6

GM factory document — 2025 gmc sierra ev denali fleet order guide rpo codes, p.1.
GM factory document — 2025 gmc sierra ev denali fleet order guide, p.6.

Sierra — T1XX (2019–2026)

2022 Factory-verified

GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.14.

Yukon — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: AT4 Ultimate, Denali Ultimate: S; AT4, Denali: O

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.12.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.12.
GM factory document — 2025 gmc new yukon denali fleet order guide, p.74.
GM factory document — 2026 gmc yukon denali fleet order guide, p.81.
GM factory document — 2027 gmc yukon fleet order guide, p.18.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: AT4 Ultimate, Denali Ultimate: S; AT4, Denali: O

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.12.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.12.
GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.80.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.82.
GM factory document — 2027 gmc yukon xl fleet order guide, p.18.

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