2006 Hummer H2 Engine cooling Problems
- Complaints
- 2about this part
- Share
- 9%of 22 total for the year
- Median mileage
- 27,734miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine cooling of the 2006 Hummer H2, 9% of the 22 complaints for this model year. Where a mileage was given, the median is 27,734 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.
“The air filter covers on my H2 get hot and start deforming ripples in the plastic. The plastic molding between them where the wipers go through deforming also. I have replaced 4 air filter covers in under 6,000 miles. And 1 wiper molding. I am not sure of the consequences. Hummer says it's no problem. I have 1 of the air filter covers that has failed in my possession. According to GM/Hummer there is no problem. They will just keep replacing them.”
NHTSA complaint #10250539, filed 2008-12, 467 miles“1. Normal driving in town and highway 2. Failure of the drivers side exhaust manifold bolts; causes exhaust gases to fill engine compartment and bypasses the catalytic emissions equipment. 3. Drivers side head had to be removed, broken manifold bolts extracted from the head, new manifold and stronger manifold bolts installed.”
NHTSA complaint #10280864, filed 2009-08, 55,000 milesRelated service bulletins
- 10251890Mar 13, 2024This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank…
- 10250775Feb 22, 2024This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large…
- 10249579Jan 12, 2024This PI bulletin advises the technician on the proper way to install the pistons in an engine.
- 10245395Nov 6, 2023This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing…
- 10244273Oct 6, 2023This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
- 10242262Aug 24, 2023This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and…
- 10240344Jul 31, 2023This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
- 10239101Jun 30, 2023This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
- 10236164Apr 24, 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…
- 10235802Apr 24, 2023This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
Engine cooling: other model years
Other parts of the 2006 Hummer H2
4 complaintsElectrical system
4 complaintsSuspension
4 complaintsEngine
3 complaintsSteering
3 complaintsAir bags
2 complaintsOther or unknown
2 complaintsSeats
2 complaintsTransmission and drivetrain
2 complaintsVisibility (wipers, defrost, mirrors)
2 complaintsEquipment
1 complaintsFuel system
1 complaints
← All problems reported for the 2006 Hummer H2
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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