R4K Factory-verified

GMC · Regular Production Option

Wheels, 22 inch (55.9 cm), 7-spoke, ultra-bright machined with After Midnight Metallic and high-gloss accents

Years 2027 Models 2 Factory citations 2
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Documented applications

This page aggregates every documented appearance of R4K in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.