Brake, lightweight, disc/drum

Years 1967–72, 1989, 2004–09 Models 3 Factory citations 7

Query this via API →

Also described as 4.10 rear axle ratioBrake system, light duty

Also documented for Buick GMC

Documented applications

C/K Trucks

1967–72 Single-source

—

Celebrity — A-body (1982–1990)

1989 Factory-verified internal

only in: sedan (the 1989 page prints the code as JAI); 1988 is not claimed: the 1988 page (p.25) prints its model year as T988

GM Heritage factory kit — 1989 Chevrolet Celebrity, p.47.

Colorado — GMT355 (2004–2012)

2004–2009 Factory-verified

GM factory document — 2004 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2007 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet colorado pickup 2wd rpo code list, p.1.

This page aggregates every documented appearance of JA1 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.