2004 Hummer H2 Engine cooling Problems
- Complaints
- 1about this part
- Share
- 2%of 59 total for the year
- Median mileage
- 48,354miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine cooling of the 2004 Hummer H2, 2% of the 59 complaints for this model year. Where a mileage was given, the median is 48,354 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.
“I own a 2004 Hummer h-2, no alterations to the engine, drive train, or chassis. While driving the vehicle will stall. This vehicle will just shut off at freeway speed. I took it to the dealership after the last event only to be told the following day that the truck is fine and not stalling.”
NHTSA complaint #10233586, filed 2008-07, 48,354 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…
- 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.
- 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.
- 10234141Mar 23, 2023This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
- 10234110Mar 17, 2023This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
Engine cooling: other model years
Other parts of the 2004 Hummer H2
14 complaintsElectrical system
14 complaintsVisibility (wipers, defrost, mirrors)
13 complaintsSteering
6 complaintsAir bags
3 complaintsBody and structure
3 complaintsSuspension
3 complaintsElectronic stability control
2 complaintsEngine
2 complaintsOther or unknown
2 complaintsTransmission and drivetrain
2 complaintsEquipment
1 complaints
← All problems reported for the 2004 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