NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
35 reportsClear category filter47,644 miles · Nov 5, 2010
Engine And Engine Cooling
2006 HUMMER H3 47000 MILES ONLY 2 MONTHS OUT OF WARRANTY. CHECK ENGINE LIGHT CAME ON, NOTICED ROUGH IDLE. DEALER SAYS MUST REPLACE HEAD DUE TO MISFIRE AND TROUBLE WITH CYLINDER 5. DEALER RECOGNIZED COMMON PROBLEM WITH THIS ENGINE, BUT REFUSED TO DO ANYTHING BUT DISCOUNT THE REPAIR FROM 3200 PLUS TAX DOWN TO 2800. THIS APPEARS …
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2006 HUMMER H3 47000 MILES ONLY 2 MONTHS OUT OF WARRANTY. CHECK ENGINE LIGHT CAME ON, NOTICED ROUGH IDLE. DEALER SAYS MUST REPLACE HEAD DUE TO MISFIRE AND TROUBLE WITH CYLINDER 5. DEALER RECOGNIZED COMMON PROBLEM WITH THIS ENGINE, BUT REFUSED TO DO ANYTHING BUT DISCOUNT THE REPAIR FROM 3200 PLUS TAX DOWN TO 2800. THIS APPEARS TO BE SAME ENGINE PROBLEM AS WAS COVERED FOR THE COLORADO, BUT GM REFUSES TO HELP WITH H3! *TR
NHTSA ODI #10364220
27,000 miles · Jul 25, 2010
Engine And Engine Cooling
I OWN A HUMMER H3 THE OTHER DAY THE AIRCONDITION STOP WORKING I LOOK AT THE HEATER BLOWER THE LINKS TO THE AIR CONDITIONER THE WIRES AND RESISTOR WERE FRAYED AND EXTREME HOT. I HAD TO UN HOOK IT SO IT WON'T START A FIRE. I AM NOT THE ONLY PERSON WITH THIS COMPLAINT AND I READ OTHER PEOPLES STORY'S THERE SHOULD BE A RECALL, I WAS…
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I OWN A HUMMER H3 THE OTHER DAY THE AIRCONDITION STOP WORKING I LOOK AT THE HEATER BLOWER THE LINKS TO THE AIR CONDITIONER THE WIRES AND RESISTOR WERE FRAYED AND EXTREME HOT. I HAD TO UN HOOK IT SO IT WON'T START A FIRE. I AM NOT THE ONLY PERSON WITH THIS COMPLAINT AND I READ OTHER PEOPLES STORY'S THERE SHOULD BE A RECALL, I WAS TOLD TO REPLACE IT COULD CAUSE A FIRE. *TR
NHTSA ODI #10345124
50,000 miles · May 13, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT STATED THAT SHE NOTICED A PUDDLE OF RADIATOR FLUID UNDERNEATH THE VEHICLE AFTER IT WAS PARKED. THE VEHICLE WAS TAKEN TO A LOCAL MECHANIC WHO STATED THAT THE RADIATOR NEEDED TO BE REPLACED. PRIOR TO THE FAILURE, THE CONTACT NOTICED THE CHECK ENGINE LIGHT ILLUMINATED ON THE INSTRUM…
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TL*THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT STATED THAT SHE NOTICED A PUDDLE OF RADIATOR FLUID UNDERNEATH THE VEHICLE AFTER IT WAS PARKED. THE VEHICLE WAS TAKEN TO A LOCAL MECHANIC WHO STATED THAT THE RADIATOR NEEDED TO BE REPLACED. PRIOR TO THE FAILURE, THE CONTACT NOTICED THE CHECK ENGINE LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE VEHICLE HAD NOT BEEN REPAIRED AT THE TIME OF THE COMPLAINT. THE FAILURE MILEAGE WAS APPROXIMATELY 50,000. THE CURRENT MILEAGE WAS APPROXIMATELY 76,000. UPDATED 08/17/10. *LJ UPDATED 08/23/10*JB
NHTSA ODI #10330272
77,675 miles · Apr 13, 2010
Engine And Engine Cooling
CALLED BY CUSTOMER COMPLAINT OF ROUGH IDLE AND MISFIRE. VEHICLE IS A 2006 HUMMER H3 WITH THE L52 I-5 CYLINDER ENGINE. MILEAGE IS 77675 DIAGNOSIS REVEALED CYLINDER #5 WAS BAD. FURTHER TESTING REVEALED WATER IN THE OIL. FINAL DIAGNOSIS BLOWN HEAD GASKET. THIS IS A RECURRING PROBLEM WITH THIS ENGINE AND VEHICLE. DEALER REFUS…
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CALLED BY CUSTOMER COMPLAINT OF ROUGH IDLE AND MISFIRE. VEHICLE IS A 2006 HUMMER H3 WITH THE L52 I-5 CYLINDER ENGINE. MILEAGE IS 77675 DIAGNOSIS REVEALED CYLINDER #5 WAS BAD. FURTHER TESTING REVEALED WATER IN THE OIL. FINAL DIAGNOSIS BLOWN HEAD GASKET. THIS IS A RECURRING PROBLEM WITH THIS ENGINE AND VEHICLE. DEALER REFUSED TO REPAIR THOUGH IT IS THE SAME ENGINE GM ISSUED A TECHNICAL BULLETIN CALLING FOR CHANGING HEADS ON THE COLORADO. *TR
NHTSA ODI #10325577
60,000 miles · Mar 23, 2010
Engine And Engine Cooling
1. DURING NORMAL DRIVING AND IDLEING I STARTED SEEING / HEARING THE ENGINE MISFIRE AND ILLUMINATION OF THE SERVICE ENGINE SOON (SES) I WOULD EXPERIENCE ABRUPT LOSS OF POWER OR SURGING OR IDLE ROUGHNESS. AFTER RESEARCH AND DEALER DIAGNOSIS WE FOUND THE EARLY HUMMER H3 HAS THE SAME ATLAS L52 I-5 ENGINE AS THE 04-05 CHEVROLET …
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1. DURING NORMAL DRIVING AND IDLEING I STARTED SEEING / HEARING THE ENGINE MISFIRE AND ILLUMINATION OF THE SERVICE ENGINE SOON (SES) I WOULD EXPERIENCE ABRUPT LOSS OF POWER OR SURGING OR IDLE ROUGHNESS. AFTER RESEARCH AND DEALER DIAGNOSIS WE FOUND THE EARLY HUMMER H3 HAS THE SAME ATLAS L52 I-5 ENGINE AS THE 04-05 CHEVROLET COLORADO. THE 04-05 CHEVEROLET COLORADO ATLAS L52 I-5 ENGINE WAS GIVEN A SPECIAL COVERAGE FOR SOFT ENGINE INTAKE VALVE SEATS, EXTENDED THE WARRANTY TO 7 YEARS AND 100,000 MILES UNDER TSB 07123 NHTSA # 10022722. TO FIX THE PROBLEM THE HEAD IS REPLACED WITH ONE WITH HARDER VALVE SEATS. THE 2006 HUMMER H3 SHOULD ALSO BE COVERED BY THIS BULLETIN. GM HAS REFUSED TO COVER MY H3 WITH THIS PROBLEM EVEN THOUGH IT HAS THE SAME ENGINE SIMPLY BECAUSE NHTSA # 10022722 DOES NOT SPECIFICALLY SAY HUMMER H3. MY GM CASE # 71-805764673.
NHTSA ODI #10321571
54,492 miles · Jan 14, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2006 HUMMER H3. HE STATED THAT THE CHECK ENGINE LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE VEHICLE WAS TAKEN TO THE DEALER WHERE A DIAGNOSTIC TEST WAS PERFORMED PRODUCING CODES P0300 PERTAINING TO A MISFIRE AT IDLE DUE TO A LEAKING INTAKE VALVE. HE ALSO STATED THAT THE VEHICLE NEEDED A NEW CYLINDER. THE…
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TL*THE CONTACT OWNS A 2006 HUMMER H3. HE STATED THAT THE CHECK ENGINE LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE VEHICLE WAS TAKEN TO THE DEALER WHERE A DIAGNOSTIC TEST WAS PERFORMED PRODUCING CODES P0300 PERTAINING TO A MISFIRE AT IDLE DUE TO A LEAKING INTAKE VALVE. HE ALSO STATED THAT THE VEHICLE NEEDED A NEW CYLINDER. THERE WERE NO RECALLS AND THE MANUFACTURER WOULD NOT ASSUME ANY LIABILITY FOR THE FAILURES. THE WARRANTY WAS NO LONGER VALID. NO REPAIRS WERE MADE TO DATE. THE CURRENT AND FAILURE MILEAGES WERE UNDER 54,492.
NHTSA ODI #10299786
61,870 miles · Apr 9, 2009
Engine And Engine Cooling
I RECENTLY PURCHASED A 2006 H3. FROM THE DAY I BOUGHT THE CAR I HAVE NOTICED A WEIRD IDLE WHEN THE VEHICLE IS WARMING UP. UNTIL RECENTLY I THOUGHT IT WAS THE WAY THE VEHICLE RAN NORMALLY. I DECIDED TO HAVE THE VEHICLE INSPECTED BY A MECHANIC. AFTER BEING INSPECTED THE MECHANIC NOTICED THE VEHICLE'S VALVES WERE NOT SEEDED RIGHT F…
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I RECENTLY PURCHASED A 2006 H3. FROM THE DAY I BOUGHT THE CAR I HAVE NOTICED A WEIRD IDLE WHEN THE VEHICLE IS WARMING UP. UNTIL RECENTLY I THOUGHT IT WAS THE WAY THE VEHICLE RAN NORMALLY. I DECIDED TO HAVE THE VEHICLE INSPECTED BY A MECHANIC. AFTER BEING INSPECTED THE MECHANIC NOTICED THE VEHICLE'S VALVES WERE NOT SEEDED RIGHT FROM THE FACTORY, WHICH HAS CAUSED THE MISFIRE, WHICH CAUSES THE WEIRD IDLE. I NOW AM IN THE PROCESS OF CONTACTING HUMMER TO SEE IF THERE IS A SOLUTION TO THE PROBLEM. THE VEHICLE HAS ONLY 61870 MILES ON IT AND I DON'T FEEL THIS SHOULD HAVE HAPPENED THIS SOON IN THE VEHICLES LIFE. SERVICE BULLETINS HAVE BEEN WARRANTED AND I WOULD LIKE TO FIND A REASONABLE SOLUTION TO THE PROBLEM. *TR
NHTSA ODI #10264863
15,100 miles · Feb 11, 2009
Engine And Engine Cooling
I HAVE A 2006 HUMMER H3 WITH A LITTLE OVER 15,000 MILES ON IT. THERE IS AN ISSUE OF "BAD CYLINDER HEADS" IN THESE 3.5L I5 ENGINES AND GM HAS NOT STEPPED UP TO THE PLATE FOR A RECALL. ANOTHER CYLINDER HEAD HAS BEEN ORDERED FOR MY VEHICLE AND WILL BE FIXED UNDER WARRANTY. WHAT HAPPENS WHEN MY WARRANTY RUNS OUT A YEAR FROM NOW. I A…
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I HAVE A 2006 HUMMER H3 WITH A LITTLE OVER 15,000 MILES ON IT. THERE IS AN ISSUE OF "BAD CYLINDER HEADS" IN THESE 3.5L I5 ENGINES AND GM HAS NOT STEPPED UP TO THE PLATE FOR A RECALL. ANOTHER CYLINDER HEAD HAS BEEN ORDERED FOR MY VEHICLE AND WILL BE FIXED UNDER WARRANTY. WHAT HAPPENS WHEN MY WARRANTY RUNS OUT A YEAR FROM NOW. I AM NOT CRAZY ABOUT A DEALER TEARING DOWN MY ENGINE AT THIS POINT. IT HAS NOT BEEN BROKEN IN YET. I THINK THE WHOLE ENGINE SHOULD BE REPLACED. I FEEL GM KNEW OF THIS ALL ALONG AND BUILT THESE SUV'S ANYWAY WITH THE HOPES THAT THE MOTORS WILL LAST UNTIL THE WARRANTY HAS EXPIRED. *TR
NHTSA ODI #10258307
14,916 miles · Oct 15, 2008
Engine And Engine CoolingPower TrainStructure
PURCHASED A 2006 HUMMER H3 FROM THE SELLER IN THIS COMPLAINT. I PAID EXACTLY $23,250 ALL CASH FOR THIS VEHICLE. HE ACTUALLY DROVE THE VEHICLE TO NEW JERSEY FROM MASS. TO MY RESIDENCE. THE VEHICLE APPEARED TO BE IN EXCELLENT CONDITION, AS IT ONLY HAD 14K MILES WHEN I BOUGHT IT ONLY 3-MONTH'S AGO. ONE WOULD HARDLY THINK OF "HID…
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PURCHASED A 2006 HUMMER H3 FROM THE SELLER IN THIS COMPLAINT. I PAID EXACTLY $23,250 ALL CASH FOR THIS VEHICLE. HE ACTUALLY DROVE THE VEHICLE TO NEW JERSEY FROM MASS. TO MY RESIDENCE. THE VEHICLE APPEARED TO BE IN EXCELLENT CONDITION, AS IT ONLY HAD 14K MILES WHEN I BOUGHT IT ONLY 3-MONTH'S AGO. ONE WOULD HARDLY THINK OF "HIDDEN" ISSUES AT THAT MILEAGE. IN ANY EVENT, I HAVE HAD REPAIRS TO THE REAR AND FRONT DIFFERENTIAL, AS IT HAD A LEAK AND THE FRONT END WAS OUT OF ALIGNMENT. THE MOST DISTURBING THING WAS THIS SELLER LIED TO ME AND MISREPRESENTED THE "TRUE" OR ACTUAL CONDITION OF THE VEHICLE. UNFORTUNATELY WHICH WOULD SURFACE AFTER HE LEFT WITH MY $23,250 IN CASH! I WOULD E-MAIL THE SELLER AND TOLD HIM HE MISREPRESENTED HIMSELF AND THE CONDITION OF THE VEHICLE AND HOW HE APPARENTLY ABUSED IT. MORE IMPORTANTLY, I DISCOVERED "EXCESSIVE" RUST UNDERNEATH THIS VEHICLE. BECAUSE THESE CONDITIONS WERE NOT DIVULGED TO ME BY MR. JOHNSON, I AM HAVING A HARD TIME SELLING THE VEHICLE THAT PRACTICALLY CLEANED OUT ALL OF MY SAVINGS. HE CLAIMED THIS TRUCK WAS GARAGED KEPT AND THAT HE DID NO OFF ROAD RIDING. THIS APPARENTLY IS TOTALLY UNTRUE, AS THE CAR WOULD NOT HAVE AS MUCH RUST AS IT IS LOADED WITH FOR A 2006! SO, CAN YOU TELL ME WHAT RECOURSE, I MAY HAVE AS A THE BUYER, BESIDES HIRING A PRIVATE ATTORNEY WHO I CAN'T AFFORD, AS I AM ON PERMANENT DISABILITY. THERE MUST I SOMETHING MY I CAN PURSUE UNDER ANY STATE OR FEDERAL CONSUMER LAWS, ESPECIALLY, SINCE THE VEHICLE IS STILL UNDER WARRANTY BY GENERAL MOTORS.. I SHOULD ALSO ADD THAT I AM HAVING DIFFICULTY WITH A LOCAL HUMMER DEALER "ROYAL HUMMER" IN FLORHAM PARK, WHO SEEMED RELUCTANT TO ADDRESS THE MANY ISSUES I AM HAVING WITH THIS HUMMER! I WOULD ALSO APPRECIATE IF YOU CAN FORWARD THIS COMPLAINT TO GENERAL MOTORS CORPORATION, IN MICHIGAN, AS THEY SHOULD KNOW I AM HAVING DIFFICULTY WITH DEALERS WANTING TO HONOR,AS THEY SHOULD, ANY WARRANTY WORK! I AM PREPARED TO FILE EVERY COMPLAINT I COULD TO GET RESTITUTION FOR THIS APPARENT. *TR
NHTSA ODI #10245631
20,800 miles · Dec 14, 2007
Engine And Engine Cooling
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.…
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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 BODY ASSEMBLY. THE DEALER STATED THAT THIS WAS A COMMON FAILURE WITH THESE VEHICLES CAUSED BY A MANUFACTURER DEFECT. GENERAL MOTORS ACKNOWLEDGED THE FAILURE AND STATED THAT THEY WERE REPLACING THE UNIT WITH A DIFFERENT PART THAT THEY BELIEVED WOULD ELIMINATE THE FAILURE. THE REPLACEMENT WOULD BE AT THE CONTACT'S EXPENSE. THE MANUFACTURER STATED THAT THEY HAVE NOT CONSIDERED ISSUING A RECALL BECAUSE THEY ARE REPAIRING THE DEFECT AS IT OCCURS. THE FAILURE AND CURRENT MILEAGES WERE 20,800.
NHTSA ODI #10211942
Official recalls
4Jul 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.
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.
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.
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 ↗