FaultScore

FaultScore report

2007 Hummer H3 problems

Owners have filed 332 complaints about the 2007 Hummer H3 with NHTSA between 2007 and 2026. The largest single group is the electrical system. Across this model's run it ranks 2 of 4 worst.

D

FaultScore 65/100

Higher is worse. Measured against the other years of the Hummer H3.

How this is worked out

The numbers

332

Complaints

21

Crashes reported

24

Fires reported

17

Injuries reported

84,278 mi

Median mileage at failure

Half of reported failures happened before this

13%

Failed under 36,000 miles

Inside a typical bumper-to-bumper warranty

What kind of bad

The letter says how bad. This says what kind — whether this year drew an unusual number of complaints, unusually dangerous ones, or failures that arrived unusually early.

Complaint volume 63 vs 50 Severity 96 vs 50 Early failure 23 vs 50
The dashed ring is 50 — the national norm. Further out is worse.
Complaint volume — 63
Against the median year of the Hummer H3. 50 means typical for this model; 100 means roughly double.
Severity — 96
18.7% of these complaints involved a crash, fire, injury or death, against a national rate of 9.7%.
Early failure — 23
13% of failures with a mileage on record happened under 36,000 miles, against a national rate of 29%.

How 2007 compares with every other Hummer H3

Click any bar to open that year's report.

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded

What breaks on a 2007 Hummer H3

Every complaint is filed against a part. Follow any row for the complaints about that part alone.

1 crashes, 14 fires · median 90,000 mi

Engine & Cooling 57 17.2%

1 crashes, 3 fires · median 72,468 mi

0 crashes, 3 fires · median 87,500 mi

2 crashes, 1 fires · median 87,000 mi

1 crashes, 0 fires · median 87,000 mi

Airbags 19 5.7%

9 crashes, 1 fires · median 98,000 mi

Median failure at 70,693 miles

1 crashes, 0 fires · median 84,000 mi

Median failure at 84,995 miles

Brakes 10 3.0%

2 crashes, 1 fires · median 48,000 mi

Equipment & Accessories 8 2.4%

0 crashes, 1 fires · median 98,000 mi

Suspension 5 1.5%

2 crashes, 0 fires · median 121,000 mi

Steering 5 1.5%

1 crashes, 0 fires · median 92,000 mi

Seats 4 1.2%

Median failure at 72,139 miles

Acceleration & Cruise Control 4 1.2%

Median failure at 50,500 miles

Tires 3 0.9%

Median failure at 54,000 miles

Doors, Latches & Locks 2 0.6%

Median failure at 56,500 miles

Seat Belts 2 0.6%

1 crashes, 0 fires · median 91,000 mi

Lights 2 0.6%

Median failure at 54,062 miles

Exactly what failed

NHTSA files every complaint against a named sub-assembly, not just a system. This is the difference between knowing it was "the engine" and knowing which part of it — the list to hand a mechanic.

Body 12 32.4%
Fan/Motor 5 13.5%
AIR Conditioner 5 13.5%
Hood 5 13.5%
Side/Window 3 8.1%
Sun/Moon Roof Assembly 3 8.1%
Starter Assembly 2 5.4%
Interior/Under Dash 2 5.4%

When it fails

Odometer readings owners gave when they filed. About half of all complaints include one.

Under 1,000 miles 4 1.5%
1,000 – 9,999 miles 13 4.8%
10,000 – 24,999 miles 9 3.3%
25,000 – 49,999 miles 33 12.3%
50,000 – 74,999 miles 63 23.4%
75,000 – 99,999 miles 45 16.7%
100,000 – 149,999 miles 81 30.1%
150,000+ miles 21 7.8%

When owners complained

A spike years after the car went on sale usually means a part wearing out on schedule across the whole fleet — the kind of pattern no single owner can see from inside their own car.

Feb 2007 peak 15 Jul 2026

Recalls on the 2007 Hummer H3

A complaint is one owner's allegation. A recall is the point at which the manufacturer or a regulator agreed the defect is real and dangerous enough to fix for free — however old the car is.

United States — NHTSA

15V421000

VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:FAN/MOTOR

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.

Risk: If the blower motor connector module overheats, it can increase the risk of a fire.

10V179000

STRUCTURE:BODY:HOOD

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.

Risk: IF THE VEHICLE IS BEING DRIVING WHEN THIS OCCURS, IT COULD STRIKE A FOLLOWING VEHICLE AND CAUSE INJURY AND/OR PROPERTY DAMAGE.

Canada — Transport Canada

Canada runs its own recall programme, and its campaigns do not always mirror the American ones.

Recall 2015286 5,189 units in Canada

Heater And Defroster

On certain vehicles, the connector module that controls the blower motor speed in the heat/vent/air conditioning (HVAC) system could overheat under extended periods at high or medium-high blower speed. If this were to occur, it could result in the plastic around the connector module melting by the heat generated, increasing the risk of fire resulting in injury and/or damage to property. Correction: Dealers will replace the female connector and harness.

Recall 2010140 5,196 units in Canada

Accessories

On certain vehicles, the integral clip-tabs on the hood louver may fracture, which could allow the hood louver to lose its retention mechanism. As the clip-tabs break, the hood louver may 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 and strike a vehicle or a bystander, which could result in property damage, personal injury or death. Correction: Dealers will apply an adhesive to the hood louver to secure it to the hood.

Recalls cover specific build ranges, so check your own vehicle by VIN at nhtsa.gov/recalls or, in Canada, Transport Canada.

Complaints that involved harm

Reports where the owner recorded a crash, a fire, an injury or a death.

at 197,000 miles New Haven, CT Fire

ELECTRICAL SYSTEM

The contact owned a 2007 Hummer H3. The contact stated that while the vehicle was parked, the AC was turned on, and the contact became aware of smoke entering the cabin of the vehicle. The smoke was coming from the front passenger's side underneath the dashboard. The AC was turned off, and the smoke ceased. The contact exited the vehicle and went into the store. The contact exited the store and was informed by a shopper that the vehicle was on fire. The vehicle was unoccupied. The fire was coming from underneath the hood of the vehicle. The Fire Department arrived on the scene and extinguished the fire. The Fire Inspector informed the contact that the fire was a thermal event related to HVAC wiring. In addition, the contact was informed of an unknown recall; however, the VIN was not associated with a recall related to the failure. The vehicle was destroyed. The charred remains of the vehicle were towed to a local tow yard. A Police report was filed. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 197,000.

NHTSA complaint #11748012 — an unverified report by a vehicle owner.

at 110,000 miles EL Paso, TX Fire

UNKNOWN OR OTHER

ON 3/13/2020 MY WIFE WAS DRIVING OUR 2007 HUMMER H3 WHEN THE ENGINE COMPARTMENT AND DASH AREA CAUGHT ON FIRE. THE BLOWER MOTOR CONNECTOR MODULE HAD BEEN REPLACED RECENTLY AS PART OF A SAFETY RECALL. THE VEHICLE WAS IN MOTION AND SHE HAD JUST MADE A LEFT TURN. ALTHOUGH THE PART HAD BEEN REPLACED, I STILL BELIEVE THAT THIS RECALL ISSUE WAS THE CAUSE OF SAID FIRE. THE FIRE DEPARTMENT CALLED IT AN ELECTRICAL ISSUE. THERE WAS NO WARNING AT ALL. THIS WAS TRAUMATIC FOR MY WIFE SHE HAD TO JUMP OUT OF THE VEHICLE AND HAD A MISCARRIAGE.

NHTSA complaint #11391170 — an unverified report by a vehicle owner.

at 110,000 miles EL Paso, TX Fire

ELECTRICAL SYSTEM

ON 3/13/2020 MY WIFE WAS DRIVING OUR 2007 HUMMER H3 WHEN THE ENGINE COMPARTMENT AND DASH AREA CAUGHT ON FIRE. THE BLOWER MOTOR CONNECTOR MODULE HAD BEEN REPLACED RECENTLY AS PART OF A SAFETY RECALL. THE VEHICLE WAS IN MOTION AND SHE HAD JUST MADE A LEFT TURN. ALTHOUGH THE PART HAD BEEN REPLACED, I STILL BELIEVE THAT THIS RECALL ISSUE WAS THE CAUSE OF SAID FIRE. THE FIRE DEPARTMENT CALLED IT AN ELECTRICAL ISSUE. THERE WAS NO WARNING AT ALL. THIS WAS TRAUMATIC FOR MY WIFE SHE HAD TO JUMP OUT OF THE VEHICLE AND HAD A MISCARRIAGE.

NHTSA complaint #11391170 — an unverified report by a vehicle owner.

at 110,000 miles EL Paso, TX Fire

ENGINE

ON 3/13/2020 MY WIFE WAS DRIVING OUR 2007 HUMMER H3 WHEN THE ENGINE COMPARTMENT AND DASH AREA CAUGHT ON FIRE. THE BLOWER MOTOR CONNECTOR MODULE HAD BEEN REPLACED RECENTLY AS PART OF A SAFETY RECALL. THE VEHICLE WAS IN MOTION AND SHE HAD JUST MADE A LEFT TURN. ALTHOUGH THE PART HAD BEEN REPLACED, I STILL BELIEVE THAT THIS RECALL ISSUE WAS THE CAUSE OF SAID FIRE. THE FIRE DEPARTMENT CALLED IT AN ELECTRICAL ISSUE. THERE WAS NO WARNING AT ALL. THIS WAS TRAUMATIC FOR MY WIFE SHE HAD TO JUMP OUT OF THE VEHICLE AND HAD A MISCARRIAGE.

NHTSA complaint #11391170 — an unverified report by a vehicle owner.

at 121,000 miles BIG Spring, TX Crash 1 injured

AIR BAGS

TAKATA RECALL AIR BAGS DID NOT DEPLOY WHEN DRIVING 75MPH SPEED LIMIT ON RURAL HWY. IT WAS REAL DARK HARD TO SEE AND I COME UP ON THE CURVE PER EYEWITNESSES STATED I WAS GOING JUST FINE THEN ALL SUDDEN WENT DWN INTO THE DITCH HEAD FIRST BACK RT TIRE BLEW OFF THEN VEHICLE STARTED FLIPPING A TOTAL OF 8X..HIT FRONT HUMMER FIRST. AND FLIPPED 8 TIMES..NO AIR BAGS DEPLOYED. HUMMER COME TO REST ON DRIVERS SIDE FINALLY. AGAIN THE RIVERSIDE AIR BAGS DID NOT DEPLOY. I FEEL LIKE THIS IS ERROR IN GM. CUZ THOSE AIRBAGS SHLD HAVE DEPLOYED AND I WOULD BE ABLE TO STAND SIT PUT MY OWN SHOES ON GET DRESSED EVERYTHING

NHTSA complaint #11176178 — an unverified report by a vehicle owner.

at 121,000 miles BIG Spring, TX Crash 1 injured

STEERING

TAKATA RECALL AIR BAGS DID NOT DEPLOY WHEN DRIVING 75MPH SPEED LIMIT ON RURAL HWY. IT WAS REAL DARK HARD TO SEE AND I COME UP ON THE CURVE PER EYEWITNESSES STATED I WAS GOING JUST FINE THEN ALL SUDDEN WENT DWN INTO THE DITCH HEAD FIRST BACK RT TIRE BLEW OFF THEN VEHICLE STARTED FLIPPING A TOTAL OF 8X..HIT FRONT HUMMER FIRST. AND FLIPPED 8 TIMES..NO AIR BAGS DEPLOYED. HUMMER COME TO REST ON DRIVERS SIDE FINALLY. AGAIN THE RIVERSIDE AIR BAGS DID NOT DEPLOY. I FEEL LIKE THIS IS ERROR IN GM. CUZ THOSE AIRBAGS SHLD HAVE DEPLOYED AND I WOULD BE ABLE TO STAND SIT PUT MY OWN SHOES ON GET DRESSED EVERYTHING

NHTSA complaint #11176178 — an unverified report by a vehicle owner.

The most recent complaints

In the owners' own words, exactly as filed with NHTSA.

at 197,000 miles New Haven, CT Fire

ELECTRICAL SYSTEM

The contact owned a 2007 Hummer H3. The contact stated that while the vehicle was parked, the AC was turned on, and the contact became aware of smoke entering the cabin of the vehicle. The smoke was coming from the front passenger's side underneath the dashboard. The AC was turned off, and the smoke ceased. The contact exited the vehicle and went into the store. The contact exited the store and was informed by a shopper that the vehicle was on fire. The vehicle was unoccupied. The fire was coming from underneath the hood of the vehicle. The Fire Department arrived on the scene and extinguished the fire. The Fire Inspector informed the contact that the fire was a thermal event related to HVAC wiring. In addition, the contact was informed of an unknown recall; however, the VIN was not associated with a recall related to the failure. The vehicle was destroyed. The charred remains of the vehicle were towed to a local tow yard. A Police report was filed. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 197,000.

NHTSA complaint #11748012 — an unverified report by a vehicle owner.

at 122,799 miles Tallahassee, FL

ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER

Odometer Fraud. The contact purchased a 2007 Hummer H3. The contact discovered that there was a mileage discrepancy. The vehicle was an independent dealer sale. At the time of purchase, the vehicle mileage was 122,791 and at the time of registration, it was discovered that the mileage was 122,799 but additional documents also showed that the mileage was unchanged over a 3-year period.

NHTSA complaint #11664822 — an unverified report by a vehicle owner.

Saratoga Springs, NY

SUSPENSION

The problem was unknown to me and probably would be to any vehicle owner that is not a mechanic. I was driving a death trap and didn't know how easily it could have been a serious problem. The driver side leaf spring bracket had completely broke apart from the frame on the upper drive side corner in an area that without getting underneath the vehicle with a flashlight and specifically looking for would be impossible to see. The only reason I know about it now is because I took it for an inspection and it failed due to this structural defect which the technician informed me was a very common issue with the 2007 H3 vehicles. He said that if I had been on a highway at 65/70 mph and this thing broke completely free the axle would swing out behind the vehicle on the drive side and cause an uncontrollable crash that could lead to severe injury and possibly death

NHTSA complaint #11568962 — an unverified report by a vehicle owner.

Worth, IL

UNKNOWN OR OTHER

Louver hood vent cover flew off on the highway as I was driving.

NHTSA complaint #11528330 — an unverified report by a vehicle owner.

at 140,000 miles Huntsville, AL

STRUCTURE

The contact owns a 2007 Hummer H3. The contact stated that while driving at various speeds, the hood louvers loosened without warning. Upon investigation, the contact discovered NHTSA Campaign Number: 10V179000 (Structure) which he linked to the failure. The dealer was notified of the failure and informed that the vehicle was already serviced prior under recall. The contact was provided an estimate for the repair. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 140,000.

NHTSA complaint #11489526 — an unverified report by a vehicle owner.

Monroe, MI

FUEL/PROPULSION SYSTEM

I have the well known issue with the passkey security system. Nothing is wrong mechanically with the car but the security system will not allow the truck to start, therefore leaving me randomly leaving me stranded. Much has been documented on this issue, yet gm has never done a recall.

NHTSA complaint #11483351 — an unverified report by a vehicle owner.

Hillsboro, OR

UNKNOWN OR OTHER

So the part that is a malfunction is the rear doors weren’t made with any child lock and of course one of my kids opened the door while i was driving on the highway.I have a 3 and 5 year old and it scared me so bad I had to hurry and pull the hummer over and park and just held my son. I couldn’t even drive after that because of how bad it traumatized me. My mom had to come get and take me and my kids home and drive my hummer back home. Even though we didn’t crash or one of my kids didn’t fall out.it’s still a very serious safety hazard. I reached out to gm to see what my options were and there response was how gm made child locks in 2007 and up and that’s not the truth because mine is a 2007 and it clearly doesn’t have child locks. Then they later proceeded to tell me I should just sell my vehicle. I was so upset because if one of my kids would have fallen out and something happened I would do everything in my power to make sure they were held accountable and file a lawsuit against them. Yes The vehicle is available to inspect. My kids safety was at risk and then me braking and pulling off the highway in panic mode could have caused an accident.it’s been reported to gm and also local dealers. There was no warning just when it happened scared me so bad because my kids are in my back seat. The photos I uploaded are of the transcribed voicemails and I’m willing to also submit the voicemails from gm as well.

NHTSA complaint #11476451 — an unverified report by a vehicle owner.

Hillsboro, OR

STRUCTURE:BODY

So the part that is a malfunction is the rear doors weren’t made with any child lock and of course one of my kids opened the door while i was driving on the highway.I have a 3 and 5 year old and it scared me so bad I had to hurry and pull the hummer over and park and just held my son. I couldn’t even drive after that because of how bad it traumatized me. My mom had to come get and take me and my kids home and drive my hummer back home. Even though we didn’t crash or one of my kids didn’t fall out.it’s still a very serious safety hazard. I reached out to gm to see what my options were and there response was how gm made child locks in 2007 and up and that’s not the truth because mine is a 2007 and it clearly doesn’t have child locks. Then they later proceeded to tell me I should just sell my vehicle. I was so upset because if one of my kids would have fallen out and something happened I would do everything in my power to make sure they were held accountable and file a lawsuit against them. Yes The vehicle is available to inspect. My kids safety was at risk and then me braking and pulling off the highway in panic mode could have caused an accident.it’s been reported to gm and also local dealers. There was no warning just when it happened scared me so bad because my kids are in my back seat. The photos I uploaded are of the transcribed voicemails and I’m willing to also submit the voicemails from gm as well.

NHTSA complaint #11476451 — an unverified report by a vehicle owner.

Holly, MI

STEERING

The (2) u-joints , upper and lower, in the steering column were failing and the front wheels would not return to straight. According to the shop that replaced the u-joints they had failed. This is the second H3 with the same problem.

NHTSA complaint #11442513 — an unverified report by a vehicle owner.

Lafayette, LA

FUEL/PROPULSION SYSTEM

I bought my 2007 hummerh3 used w/124,000 miles. I've had it a month and already had it in mechanic shop due to not starting. The mechanic thought it was a fuel relay and charged me 258.00 parts/labor/tow. Today 11-16-21, only a day after I got it back, it stopped on me again!! Just had it towed again. Just learning that this is a common problem! Is anything being done to rectify this problem?

NHTSA complaint #11440677 — an unverified report by a vehicle owner.

Tumwater, WA

UNKNOWN OR OTHER

Sunroof leaks & drain's don't work , my heart wiring plug has melted , do to water my car worning lights all were flashing then dash lights & speedometer all crashed and soon as I parked would not start. I took a dehumidifier put it in the shop and dried it out then everything worked again.

NHTSA complaint #11432617 — an unverified report by a vehicle owner.

at 160,000 miles El Paso, TX

VISIBILITY

The contact owns a 2007 Hummer H3. The contact stated while driving at 50 mph, the vehicle started to overheat and stalled. The contact stated the temperature and the check engine warning light were illuminated. The vehicle was then towed to a local dealer where it has yet to be diagnosed due to the battery needing to be replaced. The vehicle was not repaired. The contact had the vehicle serviced under NHTSA campaign number: 15V421000 (Visibility) prior to experiencing the failure. The manufacturer had not been informed of the failure. The failure mileage was approximately 160,000.

NHTSA complaint #11421692 — an unverified report by a vehicle owner.

at 160,000 miles El Paso, TX

ENGINE

The contact owns a 2007 Hummer H3. The contact stated while driving at 50 mph, the vehicle started to overheat and stalled. The contact stated the temperature and the check engine warning light were illuminated. The vehicle was then towed to a local dealer where it has yet to be diagnosed due to the battery needing to be replaced. The vehicle was not repaired. The contact had the vehicle serviced under NHTSA campaign number: 15V421000 (Visibility) prior to experiencing the failure. The manufacturer had not been informed of the failure. The failure mileage was approximately 160,000.

NHTSA complaint #11421692 — an unverified report by a vehicle owner.

at 117,000 miles Wausaukee, WI

ELECTRICAL SYSTEM

IGNITION SWITCH STAYS ON WITH KEY OFF AND OUT AND ALARM GOES OFF SOMETIMES JUST SITTING AND BATTERY GOES DEAD

NHTSA complaint #11408121 — an unverified report by a vehicle owner.

at 110,000 miles EL Paso, TX Fire

UNKNOWN OR OTHER

ON 3/13/2020 MY WIFE WAS DRIVING OUR 2007 HUMMER H3 WHEN THE ENGINE COMPARTMENT AND DASH AREA CAUGHT ON FIRE. THE BLOWER MOTOR CONNECTOR MODULE HAD BEEN REPLACED RECENTLY AS PART OF A SAFETY RECALL. THE VEHICLE WAS IN MOTION AND SHE HAD JUST MADE A LEFT TURN. ALTHOUGH THE PART HAD BEEN REPLACED, I STILL BELIEVE THAT THIS RECALL ISSUE WAS THE CAUSE OF SAID FIRE. THE FIRE DEPARTMENT CALLED IT AN ELECTRICAL ISSUE. THERE WAS NO WARNING AT ALL. THIS WAS TRAUMATIC FOR MY WIFE SHE HAD TO JUMP OUT OF THE VEHICLE AND HAD A MISCARRIAGE.

NHTSA complaint #11391170 — an unverified report by a vehicle owner.

at 110,000 miles EL Paso, TX Fire

ELECTRICAL SYSTEM

ON 3/13/2020 MY WIFE WAS DRIVING OUR 2007 HUMMER H3 WHEN THE ENGINE COMPARTMENT AND DASH AREA CAUGHT ON FIRE. THE BLOWER MOTOR CONNECTOR MODULE HAD BEEN REPLACED RECENTLY AS PART OF A SAFETY RECALL. THE VEHICLE WAS IN MOTION AND SHE HAD JUST MADE A LEFT TURN. ALTHOUGH THE PART HAD BEEN REPLACED, I STILL BELIEVE THAT THIS RECALL ISSUE WAS THE CAUSE OF SAID FIRE. THE FIRE DEPARTMENT CALLED IT AN ELECTRICAL ISSUE. THERE WAS NO WARNING AT ALL. THIS WAS TRAUMATIC FOR MY WIFE SHE HAD TO JUMP OUT OF THE VEHICLE AND HAD A MISCARRIAGE.

NHTSA complaint #11391170 — an unverified report by a vehicle owner.

at 110,000 miles EL Paso, TX Fire

ENGINE

ON 3/13/2020 MY WIFE WAS DRIVING OUR 2007 HUMMER H3 WHEN THE ENGINE COMPARTMENT AND DASH AREA CAUGHT ON FIRE. THE BLOWER MOTOR CONNECTOR MODULE HAD BEEN REPLACED RECENTLY AS PART OF A SAFETY RECALL. THE VEHICLE WAS IN MOTION AND SHE HAD JUST MADE A LEFT TURN. ALTHOUGH THE PART HAD BEEN REPLACED, I STILL BELIEVE THAT THIS RECALL ISSUE WAS THE CAUSE OF SAID FIRE. THE FIRE DEPARTMENT CALLED IT AN ELECTRICAL ISSUE. THERE WAS NO WARNING AT ALL. THIS WAS TRAUMATIC FOR MY WIFE SHE HAD TO JUMP OUT OF THE VEHICLE AND HAD A MISCARRIAGE.

NHTSA complaint #11391170 — an unverified report by a vehicle owner.

at 95,000 miles Sacramento, CA

ENGINE

VEHICLE MISFIRES FREQUENTLY. ENGINE WILL NEARLY STALL AT IDLE DUE TO MISFIRES AND SHAKE THE WHOLE VEHICLE. LACK OF POWER AND EFFICIENCY. AND JUDDERING WHILE ACCELERATING. IT IS KNOWN TO GM AND MANY PEOPLE HAVE HAD TO RESORT TO CYLINDER HEAD REPLACEMENTS COSTING HUNDREDS AT A MINIMUM.

NHTSA complaint #11388405 — an unverified report by a vehicle owner.

Centerville, OH

STRUCTURE:BODY

HOOD VENT IS LOOSE&COMING OFF.

NHTSA complaint #11387388 — an unverified report by a vehicle owner.

at 179,000 miles Kent, WA

UNKNOWN OR OTHER

OIL LIGHT COMES ON WHEN IDLE. TRUCK LOSES PRESSURE. NO DEALERSHIP SOLUTION.

NHTSA complaint #11344113 — an unverified report by a vehicle owner.

at 180,000 miles Kent, WA

UNKNOWN OR OTHER

WITH NO WARNING LIGHTS OR SIGNS, H3 WOULDN'T ACCELERATE WHILE PRESSING THE GAS.

NHTSA complaint #11344114 — an unverified report by a vehicle owner.

at 179,000 miles Kent, WA

ELECTRICAL SYSTEM

OIL LIGHT COMES ON WHEN IDLE. TRUCK LOSES PRESSURE. NO DEALERSHIP SOLUTION.

NHTSA complaint #11344113 — an unverified report by a vehicle owner.

at 179,000 miles Kent, WA

ENGINE

OIL LIGHT COMES ON WHEN IDLE. TRUCK LOSES PRESSURE. NO DEALERSHIP SOLUTION.

NHTSA complaint #11344113 — an unverified report by a vehicle owner.

at 57,000 miles Perryhall, MD

VISIBILITY:SUN/MOON ROOF ASSEMBLY

TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT WATER ENTERED THE VEHICLE FROM THE SUN ROOF ASSEMBLY. THE CONTACT STATED THAT WHILE VACUUMING WATER OUT OF THE VEHICLE, THE AIR BAGS IN THE VEHICLE DEPLOYED WITHOUT WARNING. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE SUN ROOF DRAIN TUBES WERE CLOGGED WHICH FAILED TO DRAIN WATER AS INTENDED. THE VEHICLE WAS NOT REPAIRED. THE VEHICLE WAS TAKEN TO BOYLE BUICK GMC TRUCK (3015 EMMORTON RD, ABINGDON, MD 21009) WHERE THE DASHBOARD WAS TAKEN APART AND THE CONTACT WAS INFORMED THAT THE DRAIN LINES WERE DISCONNECTED. THE DRAIN LINES WERE CLEANED AND RECONNECTED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND PROVIDED A CASE NUMBER. THE APPROXIMATE FAILURE MILEAGE WAS 57,000.

NHTSA complaint #11330378 — an unverified report by a vehicle owner.

Tulsa, OK

POWER TRAIN

TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT WHILE DRIVING, THE POWER REDUCTION AND STABILITY CONTROL WARNING LIGHTS ILLUMINATED. THE VEHICLE DECELERATED INDEPENDENTLY. THE VEHICLE WAS PULLED OVER AND RESTARTED. THE FAILURE RECURRED. THE VEHICLE WAS TAKEN TO JIM GLOVER CHEVROLET LOCATED AT 707 W 51ST ST, TULSA, OK 74107, WHERE A DIAGNOSTIC TEST WAS PERFORMED. THE TECHNICIAN DIAGNOSED THAT THE TRANSMISSION NEEDED TO BE REPLACED. THE VEHICLE WAS TOWED AN INDEPENDENT MECHANIC WHO REBUILT THE TRANSMISSION. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS UNKNOWN.

NHTSA complaint #11327083 — an unverified report by a vehicle owner.