TL* THE CONTACT OWNS A 2006 HUMMER H3. WHILE DRIVING APPROXIMATELY 40 MPH, THE VEHICLE BECAME HESITANT WHILE ACCELERATING UPHILL. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSTICS. THE TECHNICIAN STATED THAT THE HEAD GASKET NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 104,000.
2006 Hummer H3
Owner reports · Recalls · Investigations
More warning signs than most H3 years
Owner complaints for the 2006 Hummer H3 are substantially higher than the model-year median of 91.
About this comparison →How this year compares
Owner complaints by model year
Compare all H3 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
286 reports with mileage · 75 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Electrical System. Review the 96 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Engine. Review the 52 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Structure. Review the 36 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
35 reportsTL* THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT STATED THAT THE CHECK ENGINE LIGHT REMAINED ILLUMINATED AND THE ENGINE WOULD EXHIBIT A LOUD NOISE WHEN THE ACCELERATOR PEDAL WAS DEPRESSED. THE VEHICLE WAS TAKEN TO THE DEALER WHO PERFORMED A DIAGNOSTIC THAT LOCATED THE FAILURE AT THE ENGINE HEAD CYLINDER. THE VEHICLE WAS NOT RE…
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TL* THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT STATED THAT THE CHECK ENGINE LIGHT REMAINED ILLUMINATED AND THE ENGINE WOULD EXHIBIT A LOUD NOISE WHEN THE ACCELERATOR PEDAL WAS DEPRESSED. THE VEHICLE WAS TAKEN TO THE DEALER WHO PERFORMED A DIAGNOSTIC THAT LOCATED THE FAILURE AT THE ENGINE HEAD CYLINDER. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED AND DENIED ASSISTANCE WITH THE REPAIR BECAUSE THE VEHICLE WARRANTY WAS EXPIRED. THE FAILURE MILEAGE WAS 69,000 AND THE CURRENT MILEAGE WAS 71,000.
LOSS OF POWER, WAS ABLE TO DRIVE TO THE LOCAL GM DEALER.MECHANIC STATED IT WAS DUE TO A VALVE SEAT COMING LOOSE IN THE HEAD.MECHANIC ALSO STATED THIS PROBLEM WAS A RECURRING PROBLEM IN THIS 5CYL ENGINE.THE SAME ENGINE THAT IS IN THE COLORADO PICKUPS AND IS COVERED UNDER WARRANTY IN THE PICKUPS BUT NOT THE HUMMER.
TL*THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT STATED THE ENGINE COOLANT WAS LEAKING FRONT THE FRONT OF THE ENGINE. THE CONTACT EXAMINED THE VEHICLE BUT WAS NOT SURE IF THE LEAK WAS COMING FROM THE HEAD GASKET OR ENGINE BLOCK. THE VEHICLE WAS NOT TAKEN TO HAVE THE FAILURE DIAGNOSED OR REPAIRED. THE FAILURE AND CURRENT MILEAGE…
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TL*THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT STATED THE ENGINE COOLANT WAS LEAKING FRONT THE FRONT OF THE ENGINE. THE CONTACT EXAMINED THE VEHICLE BUT WAS NOT SURE IF THE LEAK WAS COMING FROM THE HEAD GASKET OR ENGINE BLOCK. THE VEHICLE WAS NOT TAKEN TO HAVE THE FAILURE DIAGNOSED OR REPAIRED. THE FAILURE AND CURRENT MILEAGES WERE 80,000.
TL* THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT STATED THAT WHEN THE VEHICLE WAS SET IN FIRST GEAR AND PARKED ON AN INCLINE, THE VEHICLE ABNORMALLY ROLL BACKWARD. THE CONTACT SPOKE WITH THE DEALER AND THEY ADVISED USING THE EMERGENCY PARKING BRAKE BECAUSE THE ENGINE WOULD NOT HAVE SUFFICIENT COMPRESSION TO HOLD THE VEHICLE. T…
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TL* THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT STATED THAT WHEN THE VEHICLE WAS SET IN FIRST GEAR AND PARKED ON AN INCLINE, THE VEHICLE ABNORMALLY ROLL BACKWARD. THE CONTACT SPOKE WITH THE DEALER AND THEY ADVISED USING THE EMERGENCY PARKING BRAKE BECAUSE THE ENGINE WOULD NOT HAVE SUFFICIENT COMPRESSION TO HOLD THE VEHICLE. THE CONTACT STATED THAT THE FAILURE SHOULD BE EXPLAINED IN THE OWNERS MANUAL SO THAT THE FAILURE WOULD NOT OCCUR. THE FAILURE AND CURRENT MILEAGE WAS 33,700.
WHILE DRIVING RECEIVED CHECK ENGINE CODE FOR #5 CYLINDER MISFIRE. TOOK IT STRAIGHT INTO THE LOCAL GM DEALER WHO INFORMED ME THE HEAD WAS ALREADY REPLACED AT 16K MILES AND NOW ANOTHER HEAD IS NEEDED. GM IS NOT WILLING TO COVER ANY COST AS THE 2006 DOES NOT HAVE A POWER TRAIN WARRANTY INCLUDED. SO CONTACTED HUMMER CUSTOMER CARE L…
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WHILE DRIVING RECEIVED CHECK ENGINE CODE FOR #5 CYLINDER MISFIRE. TOOK IT STRAIGHT INTO THE LOCAL GM DEALER WHO INFORMED ME THE HEAD WAS ALREADY REPLACED AT 16K MILES AND NOW ANOTHER HEAD IS NEEDED. GM IS NOT WILLING TO COVER ANY COST AS THE 2006 DOES NOT HAVE A POWER TRAIN WARRANTY INCLUDED. SO CONTACTED HUMMER CUSTOMER CARE LINE AND STILL WAITING ON WORD WHAT WILL BE DONE.
TL*THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT STATED THAT WHILE DRIVING 45 MPH THE CHECK ENGINE LIGHT STARTED TO ILLUMINATE. THE VEHICLE WAS TAKEN TO A MECHANIC WHO PERFORMED A DIAGNOSTIC TEST AND STATED THAT THE ENGINE MISFIRED AND HAD AN EXCESSIVE LEAK IN IT. THE EMISSION COIL WAS REPAIRED BUT THE PROBLEM CONTINUED TO OCC…
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TL*THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT STATED THAT WHILE DRIVING 45 MPH THE CHECK ENGINE LIGHT STARTED TO ILLUMINATE. THE VEHICLE WAS TAKEN TO A MECHANIC WHO PERFORMED A DIAGNOSTIC TEST AND STATED THAT THE ENGINE MISFIRED AND HAD AN EXCESSIVE LEAK IN IT. THE EMISSION COIL WAS REPAIRED BUT THE PROBLEM CONTINUED TO OCCUR. THE MANUFACTURER WAS CONTACTED AND OFFERED NO ASSISTANCE. THE FAILURE MILEAGE WAS 45,014.
2006 H3 HUMMER CUTTING OFF WHEN IDLING,WAS DIAGNOSED WITH SAME HEAD VALVE SEAT PROBLEM AS RECALLED COLORADO ATLAS ENGINE,SAME ENGINE THE H3 ENGINE SHOULD BE COVERED. *TR
TL*THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT WAS PULLING AWAY FROM A TRAFFIC LIGHT WHEN THE ENGINE BEGAN TO EXHIBIT A LOW POWER RESPONSE. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE A DIAGNOSTIC TEST WAS PERFORMED; THE TECHNICIAN WAS UNABLE TO DETECT A TROUBLE CODE AND INFORMED THAT THE PROBLEM WAS A MANUFACTURER DE…
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TL*THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT WAS PULLING AWAY FROM A TRAFFIC LIGHT WHEN THE ENGINE BEGAN TO EXHIBIT A LOW POWER RESPONSE. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE A DIAGNOSTIC TEST WAS PERFORMED; THE TECHNICIAN WAS UNABLE TO DETECT A TROUBLE CODE AND INFORMED THAT THE PROBLEM WAS A MANUFACTURER DESIGN WHICH WAS A COMMON ISSUE. THE VEHICLE WAS TAKEN TO TWO DIFFERENT INDEPENDENT MECHANICS FOR DIAGNOSIS. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 62,000.
I PURCHASED MY 2006 HUMMER H3 IN FEBRUARY 2006. AFTER DRIVING IT FOR APPROXIMATELY 5K MILES, THE CHECK ENGINE LIGHT CAME ON AND THE VEHICLE FELT LIKE IT WAS LOSING POWER. I IMMEDIATELY TOOK IT TO THE HUMMER/GM DEALER. I WAS TOLD THAT THE ENGINE CYLINDER HEADS NEEDED TO BE REPLACED AND THAT THERE WAS A PROBLEM IN THE MANUFACTU…
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I PURCHASED MY 2006 HUMMER H3 IN FEBRUARY 2006. AFTER DRIVING IT FOR APPROXIMATELY 5K MILES, THE CHECK ENGINE LIGHT CAME ON AND THE VEHICLE FELT LIKE IT WAS LOSING POWER. I IMMEDIATELY TOOK IT TO THE HUMMER/GM DEALER. I WAS TOLD THAT THE ENGINE CYLINDER HEADS NEEDED TO BE REPLACED AND THAT THERE WAS A PROBLEM IN THE MANUFACTURING PROCESS. I WAS IN SHOCK THAT I HAD THAT PROBLEM WITH A NEW VEHICLE AND I REQUESTED THAT I GET A NEW REPLACEMENT VEHICLE BECAUSE I DID NOT WANT THE "LEMON" THEY SOLD ME WITH A DEFECTIVE ENGINE. I WAS ASSURED I HAD NOTHING TO WORRY ABOUT AND THAT THE VEHICLE WOULD BE REPAIRED (UNDER WARRANTY OF COURSE) AND I WOULD NOT HAVE THE PROBLEM AGAIN. IN NOVEMBER 2010, MONTHS AFTER MY WARRANTY HAD EXPIRED, MY VEHICLE HAD THE SAME PROBLEM. IN FACT, IT IS AT THE DEALER NOW AND I STILL DO NOT KNOW HOW MUCH IT WILL COST ME TO REPAIR IT. THE ONLY REASON IT MAY BE REPAIRED AT NO COST TO ME IS BECAUSE I PAID $2650 FOR AN EXTENDED WARRANTY FROM AN OUTSIDE COMPANY (WHICH EXPIRES SOON). HOWEVER, MY EXTENDED WARRANTY COMPANY STILL NEEDS TO DETERMINE IF IT WILL COVER THE REPAIRS. I DID MY RESEARCH AND FOUND THAT MANY (TOO MANY) 2006 H3S HAVE HAD THE SAME PROBLEM WITH THE ENGINE AND IT IS A MANUFACTURING PROBLEM THAT GM IS VERY AWARE OF. HOWEVER, DESPITE NUMEROUS COMPLAINTS, GM REFUSES TO TAKE CARE OF THE PROBLEM OR ISSUE ANY BULLETIN. THIS IS A HUGE SAFETY ISSUE. IF THE ENGINE MISFIRES AND MY VEHICLE BREAKS DOWN, IT CAN EASILY CAUSE AN ACCIDENT AND/OR ROLLOVER, AND VERY WELL COST ME MY LIFE AND THE LIVES OF OTHERS. GM NEEDS TO RECALL THESE VEHICLES AND ISSUE A SAFETY BULLETIN, AND REPLACE ALL AFFECTED VEHICLES. *TR
Official recalls
415V421000 · Visibility:defroster/defogger/hvac System:fan/motor
Jul 1, 2015
General Motors LLC (GM) is recalling certain model year 2006-2010 Hummer H3 vehicles manufactured February 5, 2005, to May 24, 2010, and 2009-2010 Hummer H3T vehicles manufactured May 21, 2008, to May 24, 2010. In the affected vehicles, the connector module that controls the blower motor speed for the heating, ventilation and air conditioning system may overheat.
Consequence & remedy
Consequence: If the blower motor connector module overheats, it can increase the risk of a fire.
Remedy: GM will notify owners, and dealers will replace part of the blower motor connector and harness, free of charge. The recall began February 26, 2016. Owners may contact Hummer customer service at 1-800-732-5493. GM's number for this recall is 15042.
10V179000 · Structure:body:hood
Apr 30, 2010
GM IS RECALLING CERTAIN MODEL YEAR 2006 THROUGH 2010 HUMMER H3 VEHICLES. SOME OF THESE VEHICLES HAVE A CONDITION IN WHICH THE INTEGRAL CLIP-TABS ON THE LOUVER ON THE HOOD MAY FRACTURE, CAUSING THE HOOD LOUVER RATTLE AGAINST THE HOOD AND BECOME LOOSE. IF THIS INDICATOR IS UNNOTICED, ADDITIONAL CLIPS COULD FRACTURE AND THE HOOD LOUVER COULD DETACH FROM THE VEHICLE.
Consequence & remedy
Consequence: IF THE VEHICLE IS BEING DRIVING WHEN THIS OCCURS, IT COULD STRIKE A FOLLOWING VEHICLE AND CAUSE INJURY AND/OR PROPERTY DAMAGE.
Remedy: DEALERS WILL APPLY AN ADHESIVE TO THE HOOD LOUVER TO SECURE IT TO THE HOOD. THIS SERVICE WILL BE PERFORMED FREE OF CHARGE. THE SAFETY RECALL BEGAN ON APRIL 12, 2010. OWNERS MAY CONTACT HUMMER AT 800-732-5493 OR AT THE OWNER CENTER AT WWW.GMOWNERCENTER.COM.
06V417000 · Air Bags:frontal
Oct 31, 2006
CERTAIN VEHICLES ORIGINALLY BUILT WITH CLOTH SEATS THAT WERE EQUIPPED WITH AN AUTOMATIC AIR BAG PASSENGER SENSING SYSTEM AND LATER REUPHOLSTERED WITH AFTERMARKET LEATHER SEAT COVER KITS ARE INVOLVED. TESTING HAS INDICATED THAT THE AFTERMARKET LEATHER SEAT COVERS CAN CAUSE THE PASSENGER SENSING SYSTEM TO MALFUNCTION.
Consequence & remedy
Consequence: IF THE PASSENGER SENSING SYSTEM MALFUNCTIONS, THE FRONT AIR BAG ON THE PASSENGER SIDE MAY BE DISABLED WHEN IT SHOULD BE ENABLED, OR ENABLED WHEN IT SHOULD BE DISABLED. IN EITHER CASE, IN THE EVENT OF A CRASH THAT REQUIRES AIR BAG DEPLOYMENT, A FRONT PASSENGER'S LEVEL OF INJURY MAY BE INCREASED.
Remedy: BECAUSE A REPLACEMENT LEATHER SEAT COVER THAT IS COMPATIBLE WITH THE PASSENGER SENSING SYSTEM IS NOT AVAILABLE, GENERAL MOTORS (GM) WILL REPURCHASE THESE VEHICLES IN ACCORDANCE WITH THE TERMS STATED IN GM'S LETTER TO OWNERS. THE RECALL BEGAN ON NOVEMBER 6, 2006. OWNERS SHOULD CONTACT GM AT 1-877-477-1022 TO BEGIN THE PROCESS OF REPURCHASING THEIR VEHICLE.
05V552000 · Equipment:other:labels
Dec 7, 2005
CERTAIN TRUCKS AND SPORT UTILITY VEHICLES FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 110, "TIRE SELECTION AND RIMS." THESE VEHICLES WERE SHIPPED WITH TIRE AND LOADING INFORMATION LABELS LISTING AN INACCCURATE VEHICLE CAPACITY WEIGHT.
Consequence & remedy
Consequence: A MISPRINTED LABEL COULD LEAD TO IMPROPER VEHICLE LOADING SPECIFICATIONS OR TIRE INFLATION WHICH COULD RESULT IN A TIRE FAILURE, INCREASING THE RISK OF A CRASH.
Remedy: OWNERS WILL BE PROVIDED WITH CORRECTED LABELS AND INSTALLATION INSTRUCTIONS. AT THE CUSTOMER'S OPTION, A DEALER CAN INSTALL THE LABEL FOR THEM. THE RECALL BEGAN ON MARCH 31, 2006. OWNERS MAY CONTACT BUICK AT 1-866-608-8080, CADILLAC AT 1-866-982-2339, CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463, HUMMER AT 1-800-732-5493, PONTIAC AT 1-800-620-7668, SATURN AT 1-800-972-8876, OR ISUZU AT 1-800-255-6727.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0No exact-year investigations in this snapshot.
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