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 $1,200 to fix & occur at 92,000 miles. Click on a year below.

Worst Drivetrain Problems
stuck in 4WD, defective transfer case 2006 Hummer H3
clicking sound 2008 Hummer H3
metallic particles in transfer case oil 2008 Hummer H3