The 2009 HUMMER H3 primarily uses a four-speed automatic transmission, with a five-speed manual option available on the base 3.7-liter inline-six model. The H3 Alpha’s 5.3-liter V8 also pairs with the four-speed automatic.
In more detail, the 2009 H3 offered two main transmission configurations depending on engine and trim, with the vast majority relying on GM's Hydra-Matic 4L60-E four-speed automatic.
Transmission options by engine
The following describes which transmissions were paired with the two available powertrains in 2009 H3s.
- Five-speed manual transmission (for the 3.7L I-5 engine on select base trims)
- Hydra-Matic four-speed automatic transmission (4L60-E) available with the 3.7L I-5 and standard on the H3 Alpha’s 5.3L V8
Note: Some 2009 H3 configurations with the automatic transmission could be paired with 4x4 drivetrains, but the transmission itself remained the four-speed auto in most configurations.
Summary
Conclusion: The 2009 HUMMER H3’s transmissions are primarily the four-speed automatic (Hydra-Matic 4L60-E), with the five-speed manual option available on the base 3.7L I-5 model, and the H3 Alpha using the same four-speed automatic with its 5.3L V8.