KL9 Factory-verified

GMC · Regular Production Option

Automatic stop/start

Years 2017–20, 2022–27 Models 9 Factory citations 35

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Also described as Engine control, stop/start systemStop/start, automaticEngine control, stop-start system

Also documented for Buick Cadillac Chevrolet

Documented applications

Acadia — Second generation (C1XX) (2017–2023)

2017–2019 Factory-verified

2019 guide: SL, SLE-1, SLE-2, SLT-1: S; with the LCV engine

GM factory document — 2017 gmc acadia order guide copy gm authority, p.7, p.26.
GM factory document — 2018 gmc acadia order guide copy gm authority, p.9, p.34.
GM factory document — 2019 gmc acadia order guide copy gm authority, p.9, p.36.

Acadia — Third generation (2024–2027)

2025–2027 Factory-verified

S on all trims

GM factory document — 2025 gmc acadia fleet order guide, p.11.
GM factory document — 2026 gmc acadia fleet order guide, p.11.
GM factory document — 2027 gmc acadia fleet order guide, p.12.

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

2023–2027 Factory-verified

S on all trims

GM factory document — 2023 gmc 23canyon electrical body builder 2023march13, p.11.
GM factory document — 2024 gmc canyon fleet order guide wayback, p.1.
GM factory document — 2025 gmc canyon fleet order guide, p.6.
GM factory document — 2026 gmc canyon fleet order guide, p.8.
GM factory document — 2027 gmc canyon fleet order guide, p.8.

Sierra 1500 — Next-Generation (2027)

2027 Factory-verified

all trims: S

GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.8.
GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2026 Factory-verified

GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.11.
GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.12.
GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.12.
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.

Terrain — Second generation (D2XX) (2018–2024)

2019 Factory-verified

all trims: S

GM factory document — 2019 gmc terrain order guide copy gm authority, p.10, p.45.

Terrain — Third generation (2025–2027)

2025–2027 Factory-verified

S on all trims

GM factory document — 2025 gmc next generation terrain fleet order guide, p.4.
GM factory document — 2026 gmc next generation terrain fleet order guide, p.8.
GM factory document — 2027 gmc terrain fleet order guide, p.8.

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.9.
GM factory document — 2026 gmc yukon denali fleet order guide, p.9.
GM factory document — 2027 gmc yukon fleet order guide, p.9.

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.9.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.9.
GM factory document — 2027 gmc yukon xl fleet order guide, p.9.

This page aggregates every documented appearance of KL9 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.