- 2000–2004 Factory-verified
"ALS" as printed in every list.
GM Heritage factory kit — 2000 Chevrolet Impala, p.43.GM Heritage factory kit — 2004 Chevrolet Impala, p.30.
QPX Factory-verified
Also documented for BuickCadillacOldsmobilePontiac
Documented applications
- 2006–2009 Factory-verified
- 2000–2004, 2006–2007 Factory-verified
No 2005 list entry. Also in the kit's Monte Carlo order guide.
GM Heritage factory kit — 2006 Chevrolet Monte Carlo, p.112.
This page aggregates every documented appearance of QPX in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.