- 1998–2005 Factory-verified
the 2001–2005 lists name rear YPA and the 2001–2002 lists require B4U and P42
XPA Factory-verified
Also documented for OldsmobilePontiac
Documented applications
This page aggregates every documented appearance of XPA in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.