We don't have a lot of Hummer H3 drivetrain problems on file — feel free to add yours here. The most common H3 drivetrain problems cost $2,200 to fix & occur at 72,000 miles. Click on a year below.
- Worst Drivetrain Problems
- stuck in 4WD, defective transfer case 2006 Hummer H3
- clicking sound 2008 Hummer H3