Brake, heavy weight, disc/disc

Years 1994–96, 2000–09 Models 4 Factory citations 23

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Also documented for Oldsmobile

Documented applications

Caprice — fourth generation, B-body (1991–1996)

1994–1996 Factory-verified

GM Heritage factory kit — 1994 Chevrolet Caprice, p.67.
GM Heritage factory kit — 1995 Chevrolet Caprice, p.114.
GM Heritage factory kit — 1996 Chevrolet Caprice, p.116.

Impala — eighth generation (2000–2005)

2000–2005 Factory-verified

Own lists differ from the Intrigue's 1998-2000 lists, which read the brake system as antilock front and rear wheel.

GM factory document — 2000 chevrolet impala rpo code list, p.1.
GM factory document — 2001 chevrolet impala rpo code list, p.1.
GM factory document — 2002 chevrolet impala rpo code list, p.1.
GM factory document — 2003 chevrolet impala rpo code list, p.1.
GM factory document — 2004 chevrolet impala rpo code list, p.1.
GM factory document — 2005 chevrolet impala rpo code list, p.1.
GM Heritage factory kit — 2000 Chevrolet Impala, p.43.
GM Heritage factory kit — 2005 Chevrolet Impala, p.24.

Impala — ninth generation (2006–2016)

2006–2009 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.
GM factory document — 2009 chevrolet impala rpo code list, p.1.

Monte Carlo — sixth generation (2000–2007)

2000–2007 Factory-verified

The Intrigue's 1998-2000 lists read the brake system as antilock front and rear wheel; the Impala and Monte Carlo lists read disc/disc.

GM factory document — 2000 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2001 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2002 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2003 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2004 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2005 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2006 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2007 chevrolet monte carlo rpo code list, p.1.

This page aggregates every documented appearance of JA9 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.