T7Z ✓ Factory-verified

Chevrolet · Regular Production Option

Buckle to Drive, programmable

Years 2025–27 Models 3 Factory citations 9

Query this via API →

Also described as Buckle to drive, prevents the vehicle from being shifted out of Park until the driver seat belt is fastened

Also documented for BuickCadillac

Documented applications

Blazer — C1XX (2019–2026) →

• 2025–2026 ✓ Factory-verified

  2LT, 3LT, RS: S; Premier: S (2025 only)

  ⛭ GM factory document — 2025 chevrolet blazer fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 chevrolet blazer fleet order guide, p.2.

  ⛭ GM factory document — 2026 chevrolet blazer fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 chevrolet blazer fleet order guide, p.2.

Trailblazer — First generation, VSS-F (2021–2027) →

• 2025–2027 ✓ Factory-verified

  all trims: S; prevents the vehicle being shifted out of Park until the driver seat belt is fastened

  ⛭ GM factory document — 2025 chevrolet trailblazer fleet order guide, p.2.

  ⛭ GM factory document — 2026 chevrolet trailblazer fleet order guide, p.2.

  ⛭ GM factory document — 2027 chevrolet trailblazer limited fleet order guide, p.2.

Trax — Second generation, VSS-F (2024–2026) →

• 2025–2026 ✓ Factory-verified

  all trims: S; keeps the vehicle from shifting out of Park until the driver belt is fastened

  ⛭ GM factory document — 2025 chevrolet trax fleet order guide, p.2.

  ⛭ GM factory document — 2026 chevrolet trax fleet order guide, p.2.

Related codes · mentioned in these notes

2LT3LT

This page aggregates every documented appearance of T7Z in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.