Switch, instrumentation lighting, shut off

Years 2000–07 Models 2 Factory citations 16

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Documented applications

Impala — eighth generation (2000–2005)

2000–2005 Factory-verified

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 — 2001 Chevrolet Impala, p.35.
GM Heritage factory kit — 2005 Chevrolet Impala, p.26.

Monte Carlo — sixth generation (2000–2007)

2000–2007 Factory-verified

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 WU1 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.