- 2006–2009 Factory-verified
DT4 Factory-verified
Also documented for BuickCadillacChevroletGMCOldsmobilePontiacSaturn
Documented applications
- 2006, 2009 Factory-verified
This page aggregates every documented appearance of DT4 in the Hummer reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.