A91 Factory-verified

Chevrolet · Regular Production Option

Tailgate, remote locking

Years 1963–79, 1998, 2016–19, 2023–27 Models 6 Factory citations 12

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Also described as Vacuum remote trunk releaseVacuum trunk openerRear compartment lid, pull down

Also documented for Buick GMC Oldsmobile Pontiac

Documented applications

(1967–1968, canceled) Single-source

issued and canceled both years; dealer-installed only

Impala / Full-Size

1963–70s (varies) Confirmed

Colorado — Third generation (2023–2027)

2023–2027 Factory-verified

S on all trims

GM factory document — 2023 chevrolet 23colorado electrical body builder, p.9.
GM factory document — 2024 chevrolet 24colorado electrical body builder manual 18272478 2023oct09, p.10.
GM factory document — 2025 chevrolet colorado fleet order guide, p.38.
GM factory document — 2026 chevrolet colorado fleet order guide, p.43.
GM factory document — 2027 chevrolet colorado fleet order guide, p.43.

Malibu — Fifth generation (1997–2005)

1998 Factory-verified

platform-list code; the Malibu 1997–1999 kit order guides do not show it.

GM factory document — 1998 chevrolet malibu rpo code list, p.1.

Silverado 1500 — Fifth generation (2027)

2027 Factory-verified

GM factory document — 2027 chevrolet next generation silverado 1500 retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 chevrolet next generation silverado 1500 retail and fleet fleet order guide, p.30.

Silverado HD — K2XX (2015–2019)

2016–2019 Factory-verified

2017: GM's 2017 Silverado 2500HD order guide; 2018: GM's 2018 Silverado 2500HD order guide; 2019: GM's 2019 Silverado 2500HD order guide

GM factory document — 2016 chevrolet silverado 2500hd fleet order guide wayback, p.2.
GM factory document — 2017 chevrolet silverado 2500hd order guide revised august 12 2016 copy gm authority, p.6.
GM factory document — 2018 chevrolet silverado 2500hd order guide copy gm authority, p.7.
GM factory document — 2019 chevrolet silverado 2500hd order guide april 20 2018 iteration 2 copy gm authority, p.7.

This page aggregates every documented appearance of A91 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.