2003 Hummer H2 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Hummer H2
2003 Hummer H2 Problems
One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored in the HVAC control module which should assist in diagnoses.
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
The fuel pump may fail causing the engine to stall and not restart.
2003 Hummer H2 Questions
Climate Control Unit knobs were acting crazy so I bought a new unit thinking this was the reason that my a/c stayed on when trying to warm up. Pasenger side blows hot but even on 90 degrees the AC on drivers side is ice cold !!!
engine for about 1 minute. then faults back out and service air suspension comes on???
2003 Hummer H2 Recalls
Water may enter the windshield wiper motor module resulting in damage over time. The wipers may work intermittently or not at all. Visibility could be reduced, increasing the risk of a crash. Dealers will inspect the wiper module cover and replace it if necessary to correct this concern. The General Motors recall number is 08243.
The hydro-boost housing relief valve bore may be out of specification. The seal may fracture as a result, which may reduce braking assist and slightly increase the steering effort while braking. Under certain conditions, more braking effort will be required to stop the vehicle. Dealers will replace the hydro-boost relief valve. The recall began June 18, 2004. The GM recall number is 04004.