Restraint system, seat, inflatable, driver and passenger, roof side

Years 2004–08, 2025–26 Models 4 Factory citations 14

Also described as Airbags, frontal and seat-mounted side-impact for driver only, with head-curtain on both sides and rollover protection

Also documented for Buick Pontiac

Documented applications

Impala — ninth generation (2006–2016)

2006–2008 Factory-verified

GM factory document — 2006 chevrolet impala rpo code list, p.1.
GM factory document — 2007 chevrolet impala rpo code list, p.1.
GM factory document — 2008 chevrolet impala rpo code list, p.1.

Malibu — Sixth generation, Epsilon (2004–2008)

2004–2008 Factory-verified

shared Epsilon code (Pontiac G6).

GM factory document — 2004 chevrolet malibu rpo code list, p.1.
GM factory document — 2005 chevrolet malibu rpo code list, p.1.
GM factory document — 2006 chevrolet malibu rpo code list, p.1.
GM factory document — 2007 chevrolet malibu rpo code list, p.1.
GM factory document — 2008 chevrolet malibu classic rpo code list, p.1.
GM Heritage factory kit — 2004 Chevrolet Malibu, p.37.
GM Heritage factory kit — 2006 Chevrolet Malibu, p.28.

Monte Carlo — sixth generation (2000–2007)

2006–2007 Factory-verified

GM factory document — 2006 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2007 chevrolet monte carlo rpo code list, p.1.

Silverado Medium Duty (GM515, 2019–2026)

2025–2026 Factory-verified

GM factory document — 2025 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.

This page aggregates every documented appearance of AY1 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.