Lock control, entry, remote, keyless entry, start

Years 2005–09 Models 4 Factory citations 9

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Also described as Lock control, entry, remote, keyless entry startLock control, entry, remote keyless entry, start

Also documented for Cadillac Chevrolet GMC Hummer Pontiac Saturn

Documented applications

Enclave — Lambda / GMT967 (2008–2017)

2008 Factory-verified

GM factory document — 2008 buick enclave rpo code list, p.1.

LaCrosse — W-body / GMX365 (2005–2009)

2005–2009 Factory-verified

The 2008 and 2009 lists add that it is not to be used after the 2009 model year.

GM factory document — 2005 buick lacrosse rpo code list, p.1.
GM factory document — 2008 buick lacrosse rpo code list, p.1.
GM factory document — 2009 buick lacrosse rpo code list, p.1.

Lucerne — G-body (2006–2011)

2006–2009 Factory-verified

The 2009 list adds a "do not use after 2009 model year" remark.

GM factory document — 2006 buick lucerne rpo code list, p.1.
GM factory document — 2009 buick lucerne rpo code list, p.1.

Terraza — U-body / GMT201 (2005–2007)

2005–2007 Factory-verified

GM factory document — 2005 buick terraza rpo code list, p.1.
GM factory document — 2006 buick terraza rpo code list, p.1.
GM factory document — 2007 buick terraza rpo code list, p.1.

This page aggregates every documented appearance of AP3 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.