- 1988–1989 Factory-verified
only in: CS10803 (7-foot box) in the 1988 order guide
GM Heritage factory kit — 1988 Chevrolet S 10, p.16.GM Heritage factory kit — 1989 Chevrolet S 10, p.23.
X9H Factory-verified
Also documented for GMC
Documented applications
This page aggregates every documented appearance of X9H in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.