2009 Hummer H3 Engine cooling Problems
- Complaints
- 1about this part
- Share
- 1%of 69 total for the year
- Median mileage
- 49,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine cooling of the 2009 Hummer H3, 1% of the 69 complaints for this model year. Where a mileage was given, the median is 49,000 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.
“At approximately 49,000 mile mark, vehicle started to make unusual engine noise ie. Groan, clicking, usually between 10-20mph, would disappear,then returned between 30-40mph and disappear again at higher speeds. Took the vehicle in a total of four times to dealer. First time, they said it was the front brakes/rotors, cost $120. Noise still there. Second time, they said it was the front shocks (covered by warranty but part not in stock have to rtn a third time). Third time, they replaced front shocks(covered by warranty), noise still there. …”
NHTSA complaint #10452179, filed 2012-03, 49,000 milesRelated service bulletins
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- 10241417Aug 1, 2023This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
- 10240359Jul 31, 2023This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
- 10239101Jun 30, 2023This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
Engine cooling: other model years
Other parts of the 2009 Hummer H3
34 complaintsVisibility (wipers, defrost, mirrors)
11 complaintsEngine
9 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 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