2003 Hummer H2 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2003 Hummer H2

2003 Hummer H2 Problems

Heating 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.

Rear-end lowers after being parked

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.

Check Engine Light Due to Gas Cap Issue

A Loose or worn gas cap may cause Check Engine Light to illuminate.

See More Problems (14)

2003 Hummer H2 Questions

abs light and trac control lights coming on (1 answer)

The air that is coming out of my vents is cool, The thermostat was changed and I'm still getting no heat and no air conditioning , what else could it possibly be all of the blowers are working but just spitting out cool air (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

How to repair my power steering driver seat? (1 answer)

Driver seat stopped working unable to move forward or back.

See More Questions (69)

2003 Hummer H2 Recalls

Windshield 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.

 

Hydro-Boost Relief Valve May Not Function Properly

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.

Recall 03V075000
CERTAIN SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 114, ¿THEFT PROTECTION.¿ THESE VEHICLES ARE EQUIPPED WITH A MECHANICAL OVERRIDE THAT COULD ALLOW THE IGNITION KEY TO BE REMOVED WITH THE SHIFT LEVER IN A POSITION OTHER THAN PARK. IN...

See More Recalls (4)

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.

See More Reviews (1)