- 1987 Factory-verified
only in: V10/V20; shared square-body platform code; cited from the Chevrolet Suburban kit
GM Heritage factory kit — 1987 Chevrolet Suburban, p.25.
X6W Factory-verified
Also documented for Chevrolet
Documented applications
This page aggregates every documented appearance of X6W in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.