- 1986 Factory-verified
The 1987 order guide prints ULB, so 1987 is not claimed; shared G-body platform code; cited from the joint El Camino/Caballero pages of the Chevrolet El Camino kits
GM Heritage factory kit — 1986 Chevrolet El Camino, p.6.
UL6 Factory-verified
Also documented for CadillacChevroletPontiac
Documented applications
This page aggregates every documented appearance of UL6 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.