2003 Hummer H2 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Hummer H2
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2003 Hummer H2 ProblemsHeating and AC Temperature and Air Delivery Mode Door Actuators May Fail
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.
A Loose or worn gas cap may cause Check Engine Light to illuminate.
After my H2 is parked awhile (mostly overnight), I will find the rear end has "dropped" approximately 6" as compared to the height of the front end. The rear end will regain its height once the engine is turned on. This happens intermittently.
2003 Hummer H2 Questionsabs light and trac control lights coming on (1 answer)
The temperature gauge is moving as it should but simply not getting heat, even when I have both sides set at 90 and the fan on high and no cold air when I drop the temperature and turn on the air conditioning...no check engine lights or any other light is lit. Thank you
Driver seat stopped working unable to move forward or back.
2003 Hummer H2 RecallsWindshield Wipers May Work Intermittently or Not at All
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.