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 2007 Hummer H3 owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2007 Hummer H3. The contact stated while driving at 50 mph, the vehicle started to overheat and stalled. The contact stated the temperature and the check engine warning light were illuminated. The vehicle was then towed to a local dealer where it has yet to be diagnosed due to the battery needing to be replaced. The vehicle was not repaired. The contact had the vehicle serviced under NHTSA campaign number: 15V421000 (Visibility) prior to experiencing the failure. The manufacturer had not been informed of the failure. The failure mileage was approximately 160,000.
Tl* the contact owns a 2007 Hummer H3. While driving approximately 60 MPH, the contact smelled burning plastic. The vehicle became filled with the odor. The dealer diagnosed that the connector model, blower switch, and HVAC unit melted and needed to be replaced. The manufacturer was notified. The approximate failure mileage was 111,000.
Tl* the contact owns a 2007 Hummer H3. The contact stated that water entered the vehicle from the sun roof assembly. The contact stated that while vacuuming water out of the vehicle, the air bags in the vehicle deployed without warning. The vehicle was taken to an independent mechanic to be diagnosed. The contact was informed that the sun roof drain tubes were clogged which failed to drain water as intended. The vehicle was not repaired. The vehicle was taken to boyle Buick GMC truck (3015 emmorton rd, abingdon, md 21009) where the dashboard was taken apart and the contact was informed that the drain lines were disconnected. The drain lines were cleaned and reconnected. The manufacturer was made aware of the failure and provided a case number. The approximate failure mileage was 57,000.
Tl* the contact owns a 2007 Hummer H3. While driving at an unknown speed, the air conditioner failed to blow air out of the vents. The vehicle was taken to the dealer. The technician diagnosed that the resistor needed to be replaced. While inspecting the vehicle, the technician noticed that the resistor was completely melted. The failure recurred twice after the initial repairs were completed. The manufacturer was made aware of the failure and advised the contact that she would have to wait until the parts needed for NHTSA campaign number: 15V421000 (visibility) became available. The vehicle was not repaired. The failure mileage was 85,000.
Tl* the contact owns a 2007 Hummer H3. When the contact started the vehicle, the heater control mechanism was activated and the blower motor failed to operate. The VIN was included in NHTSA campaign number: 15V421000 (visibility) however, the part needed to perform the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was not notified of the failure. The approximate failure mileage was 102,000. VIN tool confirms parts not available.
Tl* the contact owns a 2007 Hummer H3. The contact received notification of NHTSA campaign number: 15V421000 (visibility). The dealer scheduled an appointment and then later indicated that the parts were not available. The contact was unable to determine when the parts would become available and the dealer provided no further information. The contact stated that there was a progressing failure in which there was smoke emitting from the vents while waiting to receive the recall remedy. The failure mileage was 115,074.
Tl* the contact owns a 2007 Hummer H3. The contact stated that the blower motor failed. The vehicle was not diagnosed or repaired. The contact received notification of NHTSA campaign number: 15V421000 (visibility) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not notified of the failure. The approximate failure mileage was 138,000.
Tl* the contact owns a 2007 Hummer H3. The contact stated that the blower motor functioned intermittently. 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 not made aware of the issue. The failure mileage was 89,000. VIN tool confirms parts are unavailable.
Tl* the contact owns a 2007 Hummer H3. The contact stated that the air conditioner did not function. 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 not notified of the failure. The failure mileage was approximately 86,000.
Tl* the contact owns a 2007 Hummer H3. When it rained, water leaked from the sun roof and into the vehicle. The failure occurred during rainy weather conditions. The vehicle was taken to an independent mechanic where it was repaired, but the repair failed to remedy the vehicle. The details of the repairs were unknown. The manufacturer was not made aware of the failure. The approximate failure mileage was 120,179.
Window & Wiper complaints in other H3 years
Frequently asked questions
How common are window & wiper problems on the 2007 Hummer H3?
NHTSA has 35 complaints about the windows, wipers & sunroof of the 2007 Hummer H3, 15% of the model year's 238 complaints. The component named most often is sun/moon roof assembly (3 mentions).
Is there a recall for 2007 Hummer H3 window & wiper problems?
No. NHTSA lists no windows, wipers & sunroof recall for the 2007 Hummer H3, though it has 2 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 2007 Hummer H3 window & wiper problems start?
Half of the complaints with a recorded mileage happened before about 89,000 miles, and 12% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 1 fire 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.