- 1983 Factory-verified
The page prints QxZ (lower-case x) at the highest tire price, which matches the white lettered line
GM Heritage factory kit — 1983 Chevrolet El Camino, p.5.
QXZ Factory-verified
Also documented for GMC
Documented applications
This page aggregates every documented appearance of QXZ in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.