There are 2 stored owner reports matching the powertrain & transmission leading-label group for the 2009 Hummer H3 in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)VEHICLE GOES INTO REDUCED POWER MODES AT ANY HIGHWAY SPEEDS. THE CODES INVOLVE A THROTTLE BODY, CRANKSHAFT SENSOR AND PEDAL. THIS IS EXTREMELY DAMGEROUS AT HIGHWAY SPEEDS SINCE VEHICLE IS IMMOBILE.
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. 12/10/2014: SECOND SERVICE ATTEMPT: BOTH THROTTLE BODY AND ACC PEDAL POSITION SENSOR TESTED "GOOD". WEAK BATTERY - REPLACE BATTERY. 12/22/2014: THIRD SERVICE ATTEMPT: TECH REPLACED ACCELERATOR PEDAL. RELEARNED THROTTLE/IDLE. 12/26/2014: FORTH SERVICE ATTEMPT: RELEARNED THROTTLE/IDLE PROCEDURE. 01/13/2015: FIFTH SERVICE ATTEMPT: REPROGRAM AND APPLY 6 UPDATES TO ECM. 01/14/2015: CODE THROWN AGAIN: DEALERSHIP ADVISING TO REPLACE THROTTLE BODY (BUT UNCERTAIN THAT THIS WILL FIX THE PROBLEM)? *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.