P1R Factory-verified

GMC · Regular Production Option

API Starter, 6 months

Years 2026–27 Models 9 Factory citations 23
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Also described as API Starter plan, 6 months (fleet)

Also documented for BuickCadillacChevrolet

Documented applications

This page aggregates every documented appearance of P1R in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.