RADIATOR LEAKING, HOOD VENT COMING UP, A/C CONTROL PANEL LIGHTS ARE NO LONGER WORKING
2007 Hummer H3 powertrain problems
severe 15 complaints filed with NHTSA · avg repair $2,500
Complaints
15
Recalls
0
Crashes
0
Avg fix
$2,500
What owners are reporting 2 most recent
REBUILT TRANSMISSION TWICE CLEANED THROTTLE BODY REPLACED EXHAUST MANIFOLD TWO O2 SENSORS REPLACED THE RADIATOR THE HEATER CORE A FUEL PUMP RELAY AND THIS ENGINE LIGHT STILL WILL NOT TURN OFF IT SAYS TORQUE CONVERTER CLUTCH SOLENOID I'M DISGUSTED ALREADY GM FIX UR [XXX]. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
Common questions
How serious is the powertrain problem on the 2007 Hummer H3?
It's a meaningful issue. 15 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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