Which parts fail
Components named in complaints (power windows, windshield, wipers, mirrors, sunroof).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2006 Hummer H3 owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2006 Hummer H3. The contact stated while driving 75 MPH, the hood louver detached from the vehicle and cracked the front windshield. The contact stated that the crack obstructed his vision while driving. The contact called the dealer and was informed that the vehicle was previously repaired under NHTSA Campaign Number: 10V179000 (Structure). The manufacturer was notified of the failure. The vehicle was not repaired. The failure mileage was approximately 193,000.
Tl* the contact owns a 2006 Hummer H3. The contact stated that while driving at approximately 35 MPH, there was visible smoke inside the vehicle that came from behind the dashboard. The contact drove the vehicle to the residence where it was discovered that the fan relay was burned. The contact disconnected the relay. The vehicle was not taken to the dealer. The contact received notification of NHTSA campaign number: 15V421000 (visibility), however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure. The approximate failure mileage was 115,000. The VIN was unavailable. VIN tool confirms parts not available.
Tl* the contact owns a 2006 Hummer H3. When the ignition was turned to the on position, the heat was activated, but failed to engage. The contact stated that there was a burning odor coming from the dashboard. The failure recurred continuously. The contact also observed that the resister and the wire harness were melted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and stated that the VIN was included in NHTSA campaign number: 15V421000 (visibility); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The failure mileage was approximately 115,000. VIN tool confirms parts not available.
Tl* the contact owns a 2006 Hummer H3. While driving approximately 40 MPH, white smoke appeared from the vent and the contact heard an abnormal noise. The vehicle was taken to an independent mechanic where it was diagnosed that the connector module failed. The vehicle was repaired. The contact received a recall notification of NHTSA campaign number: 15V421000 (visibility). The manufacturer was notified of the failure. The approximate failure mileage was 70,500.
Tl* the contact owns a 2006 Hummer H3. While driving approximately 50 MPH, the air conditioner was activated and began to power on and off independently. The contact also stated that there was an abnormal burning odor. The failure was recurring. The vehicle was not diagnosed or repaired. The approximate failure mileage was 118,000.
Tl* the contact owns a 2006 Hummer H3. While the vehicle was parked the contact noticed the HVAC unit failed. The vehicle was taken to the dealer for diagnostic testing and the technicians stated the HVAC blower motor over heated and melted the resistor. The technicians stated the blower motor, relay and the wiring harness needed to be replaced. The vehicle was not repaired. While driving the front drivers side mirror also began to vibrate and when depressing the accelerator pedal the vehicle would decelerate. The technician stated that the arm bracket that holds the front drivers side door mirror was broken and needed to be replaced. The vehicle was taken to the dealer where the electric pedal was replaced. The vehicle HVAC unit and the drivers side mirror were not repaired. The approximate failure mileage was 90,000.
Tl* the contact owns a 2006 Hummer H3. While the vehicle was parked, the contact noticed water on the front passenger side floorboard. In addition, the vehicle failed to start and all the gauges and meters on the instrument cluster provided incorrect readings. All the warning lights illuminated. The vehicle was taken to a dealer multiple times where it was diagnosed that the drain pipes for the sun roof needed to be cleaned. The vehicle was repaired on several occasions; however, the failure persisted. In addition, the VIN was included in NHTSA campaign number: 15V421000 (visibility); however, the part needed to repair the vehicle was unavailable. The manufacturer was notified of the failure. The failure mileage was 50,000. VIN tool confirms parts not available.
Tl* the contact owns a 2006 Hummer H3. The contact stated that the vehicle did not blow hot or cold air. In addition, the black hood louver detached from the vehicle. The failures occurred without warning. Prior to the hood louver failure, the vehicle was remedied under NHTSA campaign number: 10V179000(structure). The contact received notification of NHTSA campaign number: 15V421000 (visibility); however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The failure mileage was approximately 184,000. VIN tool confirms parts not available.
Tl* the contact owns a 2006 Hummer H3. The contact stated that while starting the vehicle, the air conditioner was activated but failed to function. The vehicle was taken to a dealer, but the contact was unsure about what part needed to be replaced. The vehicle was not repaired. The VIN was included in NHTSA campaign number: 15V421000 (visibility); however, the part needed to repair the vehicle was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was notified of the failure. The failure mileage was 147,203. Parts distribution disconnect.
Tl* the contact owns a 2006 Hummer H3. When the air conditioner was activated, the contact heard an abnormal noise. The contact also noticed hot air and an abnormal odor entering through the vents. The contact stated that the failure had the same symptoms as described in NHTSA campaign number: 15V421000 (visibility). The vehicle was taken to the dealer (southtowne Chevrolet Buick GMC, 695 bullsboro dr., newnan, ga 30265) where it was diagnosed that the air conditioner unit needed freon, but the vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 39,000.
Window & Wiper complaints in other H3 years
Frequently asked questions
How common are window & wiper problems on the 2006 Hummer H3?
NHTSA has 45 complaints about the windows, wipers & sunroof of the 2006 Hummer H3, 12% of the model year's 362 complaints. The component named most often is sun/moon roof assembly (7 mentions).
Is there a recall for 2006 Hummer H3 window & wiper problems?
No. NHTSA lists no windows, wipers & sunroof recall for the 2006 Hummer H3, though it has 4 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2006 Hummer H3 window & wiper problems start?
Half of the complaints with a recorded mileage happened before about 105,000 miles.
Is it dangerous?
Owners linked 0 crashes, 7 fires and 0 injuries to windows, wipers & sunroof problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.