- 2005 Factory-verified
U3U Factory-verified
Also documented for BuickCadillacChevroletPontiacSaturn
Documented applications
- 2009 Factory-verified
- 2009 Factory-verified
- 2007–2009 Factory-verified
This page aggregates every documented appearance of U3U in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.