- 1999–2000 Factory-verified
34U Factory-verified
Also documented for BuickCadillacChevroletOldsmobilePontiac
Documented applications
- 1999 Factory-verified
- 1999 Factory-verified
This page aggregates every documented appearance of 34U in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.