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.
It is common for the fuel level sensor in the fuel tank read the fuel level incorrectly. The sensor must be replaced to correct the condition. Our technicians recommend having the complete fuel pump module replaced on high mileage vehicles.
2003 Hummer H2 Questionssaying low oil pressure and the alert tones is what needs turned off its annoyin (1 answer)
Low oil pressure in message center
Then the alarms start and sometimes don't stop the lights and all the dash will stop working also at times ..seems like it's electrical..what can I do??
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
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.