AU5 Factory-verified

Cadillac · Regular Production Option

Lock control, entry, remote entry, low power

Years 1998–09 Models 11 Factory citations 28

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Also described as Lock control, remote entry, low power

Also documented for Buick Chevrolet GMC Hummer Oldsmobile

Documented applications

CTS — Sigma II (2008–2015)

2008–2009 Factory-verified

The 2009 list adds "Do not use after 2009 M.Y.".

GM factory document — 2008 cadillac cts rpo code list, p.1.
GM factory document — 2009 cadillac cts rpo code list, p.1.

CTS — Sigma / GMX320 (2003–2007)

2003–2007 Factory-verified

GM factory document — 2003 cadillac cts rpo code list, p.1.
GM factory document — 2007 cadillac cts rpo code list, p.1.

DeVille — G-body (2000–2005)

2000–2005 Factory-verified

GM factory document — 2000 cadillac deville rpo code list, p.1.
GM factory document — 2005 cadillac deville rpo code list, p.1.

DeVille — K-body (1994–1999)

1998–1999 Factory-verified

GM factory document — 1998 cadillac deville rpo code list, p.1.
GM factory document — 1999 cadillac deville rpo code list, p.1.

DTS — G-body (2006–2011)

2006–2008 Factory-verified

GM factory document — 2006 cadillac dts rpo code list, p.1.
GM factory document — 2008 cadillac dts rpo code list, p.1.

Eldorado — E-body (1992–2002)

1998–2000 Factory-verified

GM factory document — 1998 cadillac eldorado rpo code list, p.1.
GM factory document — 1999 cadillac eldorado rpo code list, p.1.
GM factory document — 2000 cadillac eldorado rpo code list, p.1.

Escalade EXT — GMT900 (2007–2013)

2007–2009 Factory-verified

The 2009 list adds do not use after the 2009 model year.

GM factory document — 2007 cadillac escalade ext rpo code list, p.1.
GM factory document — 2009 cadillac escalade ext rpo code list, p.1.

Escalade — GMT900 (2007–2014)

2007–2009 Factory-verified

The 2009 list adds do not use after the 2009 model year.

GM factory document — 2007 cadillac escalade rpo code list, p.1.
GM factory document — 2009 cadillac escalade rpo code list, p.1.

Seville — G-body (1998–2004)

1998–2004 Factory-verified

GM factory document — 1998 cadillac seville rpo code list, p.1.
GM factory document — 1999 cadillac seville rpo code list, p.1.
GM factory document — 2000 cadillac seville rpo code list, p.1.
GM factory document — 2001 cadillac seville rpo code list, p.1.
GM factory document — 2002 cadillac seville rpo code list, p.1.
GM factory document — 2003 cadillac seville rpo code list, p.1.
GM factory document — 2004 cadillac seville rpo code list, p.1.

SRX — Sigma / GMT265 (2004–2009)

2004–2009 Factory-verified

GM factory document — 2004 cadillac srx rpo code list, p.1.
GM factory document — 2009 cadillac srx rpo code list, p.1.

XLR — Y-body (2004–2009)

2004–2009 Factory-verified

The 2009 list adds "Do not use after 2009 model year".

GM factory document — 2004 cadillac xlr rpo code list, p.1.
GM factory document — 2009 cadillac xlr rpo code list, p.1.

This page aggregates every documented appearance of AU5 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.