Restraint system, rear seat, shoulder, retractor, 3 point, center lap

Years 1990, 2008–09, 2016, 2018–19, 2025–27 Models 5 Factory citations 9

Also described as Belts, shoulder, rear seatSeat belts, 3-point rear, all seating positionsSafety belts, rear, 3-point outboard and lap belt center position

Also documented for Buick GMC Pontiac

Documented applications

Aveo — T200 (2004–2008)

2008 Factory-verified

GM prints CLR and does not spell it out;

GM factory document — 2008 chevrolet aveo rpo code list, p.1.

Aveo — T250 (2009–2011)

2009 Factory-verified

GM factory document — 2009 chevrolet aveo rpo code list, p.1.

Blazer (full-size, K5) — Square body (1983–1991)

1990 Factory-verified

requires AM7; the 1991 OCR text prints the code with a Cyrillic A, so 1991 is left out

GM Heritage factory kit — 1990 Chevrolet Blazer, p.16.

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

2025–2027 Factory-verified

all trims: S

GM factory document — 2025 chevrolet trailblazer fleet order guide, p.4.
GM factory document — 2026 chevrolet trailblazer fleet order guide, p.4.
GM factory document — 2027 chevrolet trailblazer limited fleet order guide, p.5.

Trax — first US generation (2015–2022)

2016, 2018–2019 Factory-verified

all trims: S; the 2019 guide calls them seat belts

GM factory document — 2016 chevrolet trax fleet order guide wayback, p.2.
GM factory document — 2018 chevrolet trax order guide copy gm authority, p.17.
GM factory document — 2019 chevrolet trax order guide copy gm authority, p.17.

This page aggregates every documented appearance of AK9 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.