Transmission, 9 speed automatic, electronically controlled with overdrive, includes driver shift control

Years 2018–26 Models 2 Factory citations 7

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Also described as Transmission, 9 speed automatic

Documented applications

Blazer — C1XX (2019–2026)

2019, 2025–2026 Factory-verified

2LT: not available; 3LT: 2025: O; 2026: not available; RS: 2025: S; 2026: O; Premier: O (2025 only); with the LGX engine; the 2019 guide marks it standard on 2LT, 3LT, RS and Premier

GM factory document — 2019 chevrolet all new blazer fleet order guide wayback, p.4.
GM factory document — 2025 chevrolet blazer fleet order guide rpo codes, p.1.
GM factory document — 2025 chevrolet blazer fleet order guide, p.8.
GM factory document — 2026 chevrolet blazer fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet blazer fleet order guide, p.27.

Traverse — C1XX (2018–2024)

2018–2024 Factory-verified

S on all trims; 2020–2024: GM Authority's 2020, 2021, 2022 and 2023 model-year pages and its 2024 Traverse Limited page, which name M3V

GM factory document — 2018 chevrolet traverse order guide copy gm authority, p.19, p.63.
GM factory document — 2019 chevrolet traverse order guide copy gm authority, p.22, p.91.

This page aggregates every documented appearance of M3V in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.