Problems · NHTSA complaints
2010 Hummer H3 problems
Owners filed 7 complaints about the 2010 Hummer H3 with NHTSA between Aug 2010 and Mar 2024. The most-cited component is electrical system (4).
Complaints
7
Filed with NHTSA
Crashes
0
Reported by owners
Fires
1
Reported by owners
Injuries
0
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Electrical system4
- Power train1
- Engine1
- Visibility1
- Structure1
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 10, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
1
0
0
1
0
2
0
0
1
1
0
0
0
0
1
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2010 | 1 |
| 2011 | 0 |
| 2012 | 0 |
| 2013 | 1 |
| 2014 | 0 |
| 2015 | 2 |
| 2016 | 0 |
| 2017 | 0 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 0 |
| 2021 | 0 |
| 2022 | 0 |
| 2023 | 0 |
| 2024 | 1 |
Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Electrical system
4 reports1 fire
“TL* THE CONTACT OWNS A 2010 HUMMER H3. ON MANY OCCASIONS, THE VEHICLE WOULD NOT IMMEDIATELY START AND THE SECURITY INDICATOR ILLUMINATED. THE VEHICLE HAD BEEN SERVICED FOR THE SAME FAILURE MANY TIMES AT MARITIME MOTORS (985 POST RD, FAIRFIELD, CT). THE FUEL PUMP, ALTERNATOR, AND BATTERY WERE REPLACED DURING THE REPAIRS, BUT THE FAILURE CONTINUED. THE CAUSE OF THE FAILURE WAS NOT DETERMINED. THE MANUFACTURER WAS NOTIFIED AND PROVIDED CASE NUMBER: 95570738708. THE FAILURE MILEAGE WAS 200.”
Power train
1 report
“My transfer case established a large fluid leak so I inspected it, the findings was a large hole in the main housing on the transfer case fluid was leaking out. The transfer case was removed and disassembled, and found that the 2 screws that hold the chain guide to the housing had backed out or fell out and let the chain guide fall down in to the gear mechanism and ground it up and broke the main case. In result was the quarter size hole in the housing of the transfer case allowing liquid to escape and damage the housing. Leaving me without a vehicle.”
Engine
1 report
“WHILE I WAS ON THE ROAD GOING HOME I NOTICED THAT MY TEMPERATURE WAS SLOWLY RISING THEN ALL OF A SUDDEN MY ENGINE ROOM WAS SMOKING I PULLED ASIDE AND LOOKED AT THE ENGINE ROOM THE SMOKE WAS CAUSED BY THE RADIATOR LEAKING ON FRONT TOP COVER OF RADIATOR WAS CRACKED... DON'T GET ME WRONG BUT I NEVER DID 4 WHEELING ON MY HUMMER I DRIVE IT FOR MY EVERYDAY COMMUTE THAT'S ABOUT IT...UPON CHECKING ON BLOGS OF OTHER HUMMER OWNERS THEY SAY ITS A COMMON PROBLEM THAT'S WHY I WAS AMAZED THAT IT WASN'T A PART OF ANY RECALLS I COULD HAVE JUST IMAGINED IF IM DOING 4WHEELING WELL ANYWAYS WHEN I WENT TO THE DEALERSHIP FOR REPAIRS CAUSE IM CONFUSED ALSO ON THEIR POWERTRAIN WARRANTY CAUSE THE FIRST SENTENCE SAYS RADIATOR IS INCLUDED BUT THE SUCCEEDING PARAGRAPHS SAYS OTHERWISE...SINCE ITS A COMMON KNOWN ISSUE AND BELIEVE ME THIS THE ONLY PART OF HUMMER THAT DEALERSHIP STOCK IN THEIR INVENTORY SHOULD IT BE IN A RECALL NOTICE OR AT LEAST HAVE GM REVIEW IT CAUSE THE WAY I SEE WHY THE CRACK ON THE RADIATOR HAPPENED WAS BECAUSE OF THE FLAW OF THE DESIGN OF RADIATOR SUPPORT THE METAL LIP ON IT RUBS ON FRONT TOP COVER PORTION SO EVENTUALLY THIS WILL GIVE IN PLASTIC VS METAL WE ALL KNOW…”
Visibility
1 report1 related recall
“SUN GLARE REFLECTS OFF THE CHROME PART PLACED ON THE ENGINE HOOD AND QUICKLY BLINDS THE DRIVER FOR SHORT PERIODS OF TIME CAUSING VERY DANGEROUS ROAD DRIVING CONDITIONS. *TR”
Structure
1 report1 related recall
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 10, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.