2008 Hummer H2 Transmission and drivetrain Problems
- Complaints
- 2about this part
- Share
- 29%of 7 total for the year
- Median mileage
- 110,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the transmission and drivetrain of the 2008 Hummer H2, 29% of the 7 complaints for this model year. Where a mileage was given, the median is 110,000 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.
“Early failure of 6l80 transmission at 110k mikes car is well maintained and serviced per manual. Vehicle was performing as expected. 4 persons in the vehicle with nothing in tow and no extra cargo. In the middle of an intersection after starting off, the vehicle lost power to the wheels. Drifted to side of road, but almost got hit by a truck and would have if the failure occurred 1 second earlier. Gm has redesigned the failure points of pump, tehcm and valves, failure occurs with no warning.”
NHTSA complaint #10943985, filed 2017-01, 110,000 milesRelated service bulletins
- 11009088Sep 16, 2024This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be…
- 11001321May 16, 2024This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
- 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.
- 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…
- 10247768Sep 1, 2023This Preliminary Information communication provides information to the technician of a complaint of a sag or hesitation when accelerating. The concern is present when coasting at…
- 10242061Aug 7, 2023This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
- 10237387May 30, 2023This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be…
- 10237659May 15, 2023This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the…
- 10234619Apr 6, 2023This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
Transmission and drivetrain: other model years
Other parts of the 2008 Hummer H2
2 complaintsVisibility (wipers, defrost, mirrors)
2 complaintsAir bags
1 complaintsBrakes
1 complaintsFuel system
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2008 Hummer H2
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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