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Hummer » H2 » 2003 Hummer H2 » Car Problems

Problem Reports

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2003 Hummer H2 Problems

Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator

for the Hummer H2

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.

13 Reports

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Check Engine Light Due to Gas Cap Issue

for the Hummer H2

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

10 Reports

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The Fuel Pump May Fail Causing the Engine to Stall or Crank Over But Not Start

for the Hummer H2

The fuel pump may fail causing the engine to stall and not restart.

7 Reports

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Service Stability Message Due to Failed Steering Wheel Position Sensor

for the Hummer H2

The steering wheel position sensor may fail, resulting in the service stability message being displayed.

6 Reports

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Stalling or Low Engine Idle Speed Due to Dirty Throttle Body

for the Hummer H2

A dirty throttle body may cause a lower than normal idle and possible stalling condition. Performing a throttle body service will commonly correct this concern.

5 Reports

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Parking Brake Does Not Hold Due to Worn Parking Brake Shoes

for the Hummer H2

Units with 4 wheel disk brakes may develop at situation where the park brake does not hold as it should. Our technicians tell us this can be caused by worn park brake shoes located inside the drum section of the rear brake disks. The worn shoes should be replaced and properly adjusted to correct this issue.

5 Reports

Me Too

Corrosion on Battery Cable Ends

for the Hummer H2

The battery may leak acid at the battery cable connections. As a result corrosion may form on the battery cable ends. Leaking batteries should be replaced and the cables need to be thoroughly cleaned or replaced if necessary.

5 Reports

Me Too

Check Engine Light Due to Restricted Secondary Air Injection Check Valve

for the Hummer H2

One or both secondary air injection check valves may become restricted causing poor air flow resulting in illumination of the Check Engine Light. It is often recommend to replace both check valves even if a fault code is set for only one bank of cylinders. Replacing only one valve may result in a return trip to the repair shop.

5 Reports

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CD Player May Fail Due to Internal Fault in Radio

for the Hummer H2

The CD player may fail due to an internal fault with the radio. Our technicians tell us that in most cases, the radio unit will need to be sent to a specialty repair shop to correct this issue.

4 Reports

Me Too

Dead Battery Due to ABS Pump Not Turning Off

for the Hummer H2

The anti-lock brake system (ABS) pump may stay running after the ignition is turned off causing the battery to go dead. Our technicians tell us that the ABS control module should be replaced to correct this fault.

3 Reports

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Clicking Noise From Flasher When Turn Signals are Off

for the Hummer H2

A clicking noise may be noted from the turn signal flasher after the turn signals are switched off. This is commonly cause by a faulty turn signal switch which will require replacement.

3 Reports

Me Too

Erratic Fuel Gauge Operation

for the Hummer H2

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.

2 Reports

Me Too

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