2007 Hummer H3 Problems
RepairPal has identified the most common problems with the 2007 Hummer H3 based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.
A Loose or worn gas cap may cause Check Engine Light to illuminate.
The fuel level sensor in the fuel tank may fail causing erratic fuel gauge operation. Our technicians tell us that on high mileage vehicles you may wish to replace the complete fuel pump module assembly if this condition occurs.