- 1998–2001 Factory-verified
2001 list adds electronic
M30 Factory-verified
Also described as Transmission, automatic, 4 speed, Hydra-Matic 4L60-E
Also documented for BuickCadillacChevroletGMCHummerPontiac
Documented applications
- 2002–2004 Factory-verified
This page aggregates every documented appearance of M30 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.