- 1998–2002 Factory-verified
8R3 Factory-verified
Also described as Valve, metal
Also documented for Chevrolet
Documented applications
- 2023, 2025–2027 Factory-verified
O: Cutaway 1WT, Cutaway 2WT (2025–2026); in the 2025–2027 guides only in the Cutaway guides
This page aggregates every documented appearance of 8R3 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.