2009 Hummer H3 Engine Problems
- Complaints
- 9about this part
- Share
- 13%of 69 total for the year
- Median mileage
- 76,936miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 9 complaints about the engine of the 2009 Hummer H3, 13% of the 69 complaints for this model year. Where a mileage was given, the median is 76,936 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Every so often the passlock security system malfunctions and my Hummer won't start. I have to wait 10 minutes before I can start the vehicle again. It fails without warning. Its been happening more and more often. There was only 55,000 miles on the vehicle when I noticed it starting to act up. I sliced my fingers open on a job and had to drive myself to the emergency room but my Hummer wouldn't start because of the ignition security failure. I lost a lot of blood in my hand sitting waiting the 10 minutes. The doctor said I might lose the tips of my fingers because it took so long to get there. …”
NHTSA complaint #10839148, filed 2016-03, 55,000 miles“P2135 throttle/pedal position sensor/switch a/b voltage correlation that puts the vehicle into ?stabilitrak disabled , traction control disabled , and reduced engine power . While there is a TSB#11-06-04-007b regarding this issue and warranty coverage; unfortunately it does not apply to my engine. However, since this is a widely know issue, and this vehicle is experiencing the same conditions, one would think that my vehicle would be serviced under this TSB extended warranty coverage. 12/04/2014: first service attempt: clear code everything tests fine, let?s see if it happens again. …”
NHTSA complaint #10673043, filed 2015-01, 74,100 miles“Periodically 2-3 times a year for past 6 years when driving down the high car will die, when pull over to the side of the road, car will not restart, may restart after 10 minutes or after towed to repair shop,taken to the dealer several times and several times to high end independent auto shops, no error code ever found. Read on Hummer forums issue with ignition switch, replaced ignition switch and fault has not recurred.”
NHTSA complaint #11324231, filed 2020-05, 91,350 miles“The contact owns a 2009 Hummer H3. While the contact's son was driving approximately 60 MPH, the vehicle lost power without warning. The vehicle was pulled to the side of the road and turned off. The vehicle restarted after a couple of attempts. The vehicle was taken to a local dealer where it was diagnosed that there was engine ailure. The vehicle was not repaired. The manufacturer was made aware of the failure, but did not offer any assistance. The failure mileage was 107,000.”
NHTSA complaint #10885538, filed 2016-07, 107,000 miles“2009 Hummer H3. Consumer writes in regards to several electrical problems and other vehicle issues. Consumer has previous complaint with another vehicle listed in artemis.”
NHTSA complaint #10682300, filed 2018-03Related service bulletins
- 11009531Sep 27, 2024This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
- 11007116Aug 6, 2024This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
- 11007091Aug 5, 2024This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
- 11000119Apr 26, 2024This service bulletin provides technicians with information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
- 10242298Aug 10, 2023This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308…
- 10211658May 2, 2022This service bulletin provides policy information on warranty administration guidelines for multiple repairs with independent causes (GM Canada Dealers Only).
- 10199238May 3, 2021This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.
- 10178949Jul 28, 2020This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC…
- 10178387Jul 27, 2020This Preliminary Information communication provides information to the technician about finding needle bearings during an oil change. Technician will gain access to the roller…
- 10176326May 21, 2020This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308…
Engine: other model years
Other parts of the 2009 Hummer H3
34 complaintsVisibility (wipers, defrost, mirrors)
11 complaintsAir bags
8 complaintsBody and structure
8 complaintsOther or unknown
7 complaintsElectronic stability control
4 complaintsBrakes
3 complaintsFuel system
2 complaintsSuspension
2 complaintsTransmission and drivetrain
2 complaintsEngine cooling
1 complaintsSeat belts
1 complaints
← All problems reported for the 2009 Hummer H3
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology