- 1983 Factory-verified
Must be ordered; two-tone accent color with YE7 (the chart section the Diablo shares with the El Camino's Super Sport); the 1984 chart prints 15M against Bright Silver Metallic, whose solid code on the same chart is 17, so 1984 is not claimed; the 1985 chart uses 15M for Medium Gray Metallic (see that row); shared G-body platform code; cited from the joint El Camino/Caballero pages of the Chevrolet El Camino kits
GM Heritage factory kit — 1983 Chevrolet El Camino, p.16. - 1985 Factory-verified
Must be ordered; two-tone accent color with Z15; the 1983 chart uses 15M for Silver Metallic (see that row); shared G-body platform code; cited from the joint El Camino/Caballero pages of the Chevrolet El Camino kits
GM Heritage factory kit — 1985 Chevrolet El Camino, p.19.
15M Factory-verified
Also described as Accent color, Silver Metallic
Also documented for Chevrolet
Documented applications
This page aggregates every documented appearance of 15M in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.