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In case you wanted an El Camino but just couldn’t abide Chevrolet emblems, GMC offered the essentially identical Sprint and Caballero.

With a touch of sarcasm, the legendary racer Smokey Yunick—a GMC truck dealer himself for many years—once wrote that GMC was the only vehicle with two complete teams of engineers: Chevrolet designed the trucks, and GMC designed the hub caps and ash trays. While his salty observation wasn’t technically accurate or literally true, necessarily, he did have a point. Many GMC light vehicles were unequivocal Chevrolet clones, differing only in the names on the trim pieces.

Ackshuaalllly - Smokey would be incorrect.

The Chevrolet engineers did the GMC touches, too. There was no GMC engineering at all; only marketing.

RPO Z88 = GMC nameplate conversion
RPO X88 = Chevrolet nameplate conversion
RPO Z75 = Cadillac nameplate conversion

K

I've mentioned before, that although this is at Chevrolet Flint Assembly, it is not at the assembly plant proper.

These builds occurred in the GMARC building (GM Assembly Research Center) located at the NE corner of the property.

K

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5-time grammy winner Roy Orbison - "The Big O"