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.
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.
A Loose or worn gas cap may cause Check Engine Light to illuminate.
2003 Hummer H2 Questions
Seller says this pops on and off. What is this speedometer cluster and how much to fix. Please help. I need to purchase something to pull my boat. Has to be a big V8. Thank you.
When I brake pedal goes completely to the floor. Also, monitor on dash states brake system failure.
On. Dash. Gear. Letters. Shows (n) neutral. Postion but shit. Lever. is. In. Park. an. will. Not. shift!
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.
2003 Hummer H2 Reviews
100,000 miles and with custom exhaust & air filter get 16 mpg hwy & 14 in city and will go ANYWHERE if you know how to drive it.