- 2008–2009 Factory-verified
No TrailBlazer order guide prints it for 2005–2007 (those guides show other wheels), so only the 2008–2009 lists are claimed.
P39 Factory-verified
Documented applications
This page aggregates every documented appearance of P39 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.