Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
180–25K
2325–50K
4650–75K
3075–100K
59100–150K
16150K+
192 reports with mileage · 45 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 76 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Engine. Review the 44 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Visibility/wiper. Review the 24 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
12 crash reports18 fire reports13 injury reports
What owners actually said
237 reports
84,278 miles · Aug 8, 2013
Power TrainSeatsInjury
HAD PURCHASED VEHICLE 3 DAYS PRIOR FROM INDIVIDUAL. DROVE TO EL PASO TX1 APPROXIMATELY 80 MILES DROVE AROUND TOWN DOING ERRANDS. TRANSMISSION STARTED SLIPPING BADLY, I PULLED INTO A WAL-MART AND WENT TO CHECK THE TRANSMISSION FLUID. VEHICLE HAD A COMPRESSION TYPE DIPSTICK. WHEN I TOUCHED THE LEVER ON THE DIPSTICK IT SHOT UP APPR…
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HAD PURCHASED VEHICLE 3 DAYS PRIOR FROM INDIVIDUAL. DROVE TO EL PASO TX1 APPROXIMATELY 80 MILES DROVE AROUND TOWN DOING ERRANDS. TRANSMISSION STARTED SLIPPING BADLY, I PULLED INTO A WAL-MART AND WENT TO CHECK THE TRANSMISSION FLUID. VEHICLE HAD A COMPRESSION TYPE DIPSTICK. WHEN I TOUCHED THE LEVER ON THE DIPSTICK IT SHOT UP APPROXIMATELY 8 INCHES AND SHOWERED MY RIGHT HAND WITH VERY HOT TRANSMISSION FLUID. THIS CAUSED SECOND DEGREE BURNS TO THE PALM AND FINGERS, THIS MADE A TRIP TO THE EMERGENCY ROOM NECESSARY. THE OWNER OF THE TRANSMISSION SHOP TOLD ME THAT IN HIS 20 YEARS IN THE BUSINESS HE HAD NEVER SEEN A TRANSMISSION GET SO HOT AS TO MELT THE FILTER. THIS ONE HAD MELTED THE FILTER. *TR
NHTSA ODI #10534376
68,000 miles · Jul 28, 2013
Electrical System
HERE ARE MULTIPLE ISSUES WELL DOCUMENTED ACROSS THE INTERNET OF HUMMERS HAVING AND ISSUE WITH THESE RESISTORS, AS WELL AS CHEVY COLORADOS. MY BLOWER QUIT A FEW MONTHS AGO, AND THE RESISTORS AND WIRING HARNESS ARE MELTED TO THE POINT OF CHARRING! THE NHTSA NEEDS TO INVESTIGATE THIS OR ARE YOU WAITING FOR AN ACTUAL FIRE TO CAU…
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HERE ARE MULTIPLE ISSUES WELL DOCUMENTED ACROSS THE INTERNET OF HUMMERS HAVING AND ISSUE WITH THESE RESISTORS, AS WELL AS CHEVY COLORADOS. MY BLOWER QUIT A FEW MONTHS AGO, AND THE RESISTORS AND WIRING HARNESS ARE MELTED TO THE POINT OF CHARRING! THE NHTSA NEEDS TO INVESTIGATE THIS OR ARE YOU WAITING FOR AN ACTUAL FIRE TO CAUSE GM TO FIX THIS ISSUE? *TR
NHTSA ODI #10532267
65,000 miles · Jun 28, 2013
Engine
TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT THE VEHICLE LOST ACCELERATION POWER. THE CONTACT TOOK THE VEHICLE TO THE DEALER WHERE IT WAS DETERMINED THAT THE VALVE SEALS IN THE SECOND AND FIFTH CYLINDER HEADS HAD FAILED. THE DEALER STATED THAT THE FIFTH CYLINDER HEAD WAS THE MOST DOMINANT AND CAUSED THE MAJORI…
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TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT THE VEHICLE LOST ACCELERATION POWER. THE CONTACT TOOK THE VEHICLE TO THE DEALER WHERE IT WAS DETERMINED THAT THE VALVE SEALS IN THE SECOND AND FIFTH CYLINDER HEADS HAD FAILED. THE DEALER STATED THAT THE FIFTH CYLINDER HEAD WAS THE MOST DOMINANT AND CAUSED THE MAJORITY OF THE FAILURE. THE CONTACT STATED THAT BOTH CYLINDER HEADS HAD A 70 PERCENT LEAK. THE FAILURE WAS REPORTED TO THE MANUFACTURER. THE VIN WAS NOT AVAILABLE. THE FAILURE MILEAGE WAS 65,000 AND THE CURRENT MILEAGE WAS 80,000. *TR
NHTSA ODI #10522294
65,700 miles · Jun 25, 2013
Engine And Engine Cooling
RADIATOR IS CRACKED ON DRIVER SIDE DUE TO RUBBING OF METAL PARTS. *TR
NHTSA ODI #10521603
160,000 miles · May 29, 2013
Engine
TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT WHILE DRIVING 50 MPH, EXHAUST FUMES FILLED THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSIS WHERE IT WAS ADVISED TO THE CONTACT THAT THE MANIFOLD GASKET NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE A…
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TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT WHILE DRIVING 50 MPH, EXHAUST FUMES FILLED THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSIS WHERE IT WAS ADVISED TO THE CONTACT THAT THE MANIFOLD GASKET NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATED FAILURE MILEAGE WAS 160,000. *TR
NHTSA ODI #10514107
47,400 miles · May 8, 2013
EngineFuel/propulsion System
EXHAUST MANIFOLD BOLTS ARE BREAKING OFF THE BLOCK!. *TR
NHTSA ODI #10511187
39,462 miles · Apr 17, 2013
Structure
TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT THE INTEGRAL CLIP TABS ON THE HOOD FRACTURED AND LOOSENED. THE VEHICLE WAS REPAIRED UNDER NHTSA CAMPAIGN NUMBER: 10V179000 (STRUCTURE) BUT THE FAILURE RECURRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 39,462 AND THE CUR…
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TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT THE INTEGRAL CLIP TABS ON THE HOOD FRACTURED AND LOOSENED. THE VEHICLE WAS REPAIRED UNDER NHTSA CAMPAIGN NUMBER: 10V179000 (STRUCTURE) BUT THE FAILURE RECURRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 39,462 AND THE CURRENT MILEAGE WAS 51,000. *TR
NHTSA ODI #10508589
94,000 miles · Apr 11, 2013
Electrical System
THE ANTI-THEFT PASSLOCK SYSTEM IS FAULTY AND WILL NOT LET ME START MY CAR. IT HAS HAPPENED TWICE SINCE I GOT THE CAR IN DECEMBER OF LAST YEAR. GOING ON-LINE TO SEE WHAT TO DO ABOUT IT MADE ME AWARE OF THE OVERWHELMING AMOUNT OF GM CAR OWNERS THAT THIS HAS AFFECTED. SOME BEING STRANDED FOR HOURS AND DAYS OF NOT BEING ABLE TO S…
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THE ANTI-THEFT PASSLOCK SYSTEM IS FAULTY AND WILL NOT LET ME START MY CAR. IT HAS HAPPENED TWICE SINCE I GOT THE CAR IN DECEMBER OF LAST YEAR. GOING ON-LINE TO SEE WHAT TO DO ABOUT IT MADE ME AWARE OF THE OVERWHELMING AMOUNT OF GM CAR OWNERS THAT THIS HAS AFFECTED. SOME BEING STRANDED FOR HOURS AND DAYS OF NOT BEING ABLE TO START THEIR CARS DUE TO THE FAULTY PASSLOCK SYSTEM. IT IS HAPPENING TO ALL MAKES AND MODELS OF GM CARS. I CALLED GM AND THEY WEREN'T INTERESTED IN DOING ANYTHING ABOUT THE PROBLEM UNLESS YOU FORCE THEM TO. PLEASE CHECK INTO THIS AND HELP THOSE OF US WHO GET STRANDED IN PLACES (SOMETIMES SCARY PLACES) BECAUSE OUR CAR WON'T START. THANK YOU. *TR
NHTSA ODI #10505988
65,000 miles · Mar 5, 2013
Electrical System
DRIVING DOWN THE ROAD AT 20 DEGREES OUTSIDE AND THE HEATER FAN QUIT. HAD CUT OUT A COUPLE TIMES BEFORE AND COME BACK ON. *TR
NHTSA ODI #10501451
25,000 miles · Jan 28, 2013
Power Train
THIS VEHICLE HAS HAD TRANSMISSION ISSUES SINCE 25,000 MILES. NO CODE EVER INDICATED SO DEALERS WOULD NOT INVESTIGATE TRANSMISSION UNTIL 1ST AND 2ND GEARS FAILED. PROBLEM OF INCORRECT SHIFTING CONTINUED WITH SEVERAL STOPS AT THE DEALERSHIP. NO CODE NO SERVICE. NOW THE TRANSMISSION SLAMMED IN REVERSE INITIATING A CODE (SPEED SENSO…
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THIS VEHICLE HAS HAD TRANSMISSION ISSUES SINCE 25,000 MILES. NO CODE EVER INDICATED SO DEALERS WOULD NOT INVESTIGATE TRANSMISSION UNTIL 1ST AND 2ND GEARS FAILED. PROBLEM OF INCORRECT SHIFTING CONTINUED WITH SEVERAL STOPS AT THE DEALERSHIP. NO CODE NO SERVICE. NOW THE TRANSMISSION SLAMMED IN REVERSE INITIATING A CODE (SPEED SENSOR PASS/FAIL). AFTER AGREEING TO REPLACE THE PORTION OF THE TRANSMISSION THAT CONTAINS THE SHORTED SPEED SENSOR, IT WAS DISCOVERED THE TRANSMISSION WAS CONTAMINATED BY RADIATOR FLUID. NOW THE RADIATOR, NOT COVERED BY WARRANTY, ALSO MUST BE REPLACED WITH THE COMPLETE TRANSMISSION. RESEARCHING HUMMER FORUMS, THIS IS APPARENTLY A KNOWN ISSUE WITH THE SPEED SENSOR AND RADIATOR CONTAMINATION THAT IS BEING IGNORED. *TR
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.
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.
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
0
No exact-year investigations in this snapshot.
2007 Hummer H3 Problems, Complaints & Recalls | Skip That Year