TL* THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 55 MPH, THERE WAS A REDUCTION IN THE ENGINE POWER AS THE RPMS DECREASED. THE VEHICLE BEGAN TO VIBRATE VIOLENTLY. THE VEHICLE WAS TAKEN TO THE DEALER ON THREE SEPARATE OCCASIONS. THE MECHANIC REPLACED THE HEAD GASKET AND ENGINE COIL TWICE. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE…
2006 Hummer H3 engine problems
moderate 70 complaints filed with NHTSA · avg repair $3,100
Complaints
70
Recalls
0
Crashes
0
Avg fix
$3,100
What owners are reporting 4 most recent
ON SEVERAL OCCASIONS THE ENGINE HAS LOSS POWER IN TRAFFIC AND SLOWS DOWN TO 15 MILES AN HOUR. ONCE ON THE HIGHWAY CAUSING OTHER CARS TO SWERVE TO AVOID REAR ENDING US. ANOTHER IN RURAL TRAFFIC CAUSING OTHER CARS TO GO AROUND. WE ARE ALWAYS LEARY WHEN DRIVING THIS VEHICLE. OUR MECHANIC HAS LOOKED IT OVER ON BOTH OCCASIONS AND CAN NOT FIND ANYTHING WRONG AND WE HAVE THE BEST MECHANIC IN TOWN. GM SHO…
MY VEHICLE HAS A CRACKED RADIATOR AND ACCORDING TO OTHER HUMMER OWNERS THIS IS A COMMON DEFECT THAT HAPPENS TO THESE VEHICLES. *TR
TL*THE CONTACT OWNS A 2006 HUMMER H3. WHILE IDLING AT A STOP LIGHT, THE ACCELERATOR PEDAL AUTOMATICALLY EXTENDED TO THE FLOOR AND THE VEHICLE SPED FORWARD. THE CONTACT HAD TO DEPRESS THE BRAKE PEDAL WITH BOTH FEET TO PREVENT CRASHING INTO THE PRECEDING VEHICLE. THE VEHICLE THEN WENT INTO LIMP MODE AND WOULD NOT EXCEED 20 MPH. THE VEHICLE WAS TOWED TO THE DEALER AND THEY REPLACED THE THROTTLE B…
Common questions
How serious is the engine problem on the 2006 Hummer H3?
It's a documented issue but not catastrophic. 70 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine 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 $3,100 for engine 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 engine?
No active recalls currently cover engine 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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