2009 Pontiac G8 Transmission and drivetrain Problems
- Complaints
- 9about this part
- Share
- 6%of 144 total for the year
- Median mileage
- 17,025miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 9 complaints about the transmission and drivetrain of the 2009 Pontiac G8, 6% of the 144 complaints for this model year. Where a mileage was given, the median is 17,025 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 transmission on my 2009 G8 (6k miles) is very rough shifting especially when cold. When trying to stop, the transmission frequently hesitates to down shift, remaining in the higher gear. If the driver doesn't pay attention and apply constant pressure on the brakes, the car will continue to move forward into the intersection uncommanded. If the driver lets off the brake before the downshift occurs, the car will accelerate dangerously. The dealer applied a technical service bulletin on this issue before I took deliver, but it has not resolved the issue. …”
NHTSA complaint #10273919, filed 2009-06, 6,500 miles“First occurred n 11/23/2009. On the interstate it loses all power, engine shuts down, ignition stops, power steering stops, brakes fail - complete vehicle stoppage and full operating systems shut down without warning at 70 MPH, twice! Second occurrence was 1/26/2010.”
NHTSA complaint #10308246, filed 2010-02, 17,150 miles“Vehicle will suddenly throw ABS/traction control/brake system/airbags failure notices; vehicle then goes into limp mode and the transmission locks into first gear. Has occurred 3 times, dealership unable to diagnose or repair. They have cleared all mil/DTC codes and re-flashed ECM 3 times. The problem has occurred once on the interstate in heavy traffic at 70mph and twice on city streets in rush hour traffic, with significant chance for accident/crash. …”
NHTSA complaint #10414804, filed 2011-07, 40,000 miles“Also occurred again on 1/26/2010/ on the interstate it loses all power, engine shuts down, ignition stops, power steering stops, brakes fail - complete vehicle stoppage and full operating systems shut down without warning at 70 MPH, twice!”
NHTSA complaint #10308244, filed 2010-02, 16,900 miles“Transmission fails to downshift immediately after accelerating, leaving driver in vulnerable position of being slow to merge into traffic as anticipated. This action is a daily occurrence since car purchased.”
NHTSA complaint #10242125, filed 2008-09, 500 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.
- 10248721Dec 18, 2023This bulletin advises the technician that the 6L50 (MYB), 6L80 (MYC) and 6L90 (MYD) Transmission Oil Filter and Seal Kit part number 24236933 is currently transitioning from a…
- 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.
- 10237846Jun 7, 2023This service bulletin provides information to dealership personnel on automatic transmission shift and engine driveability concerns and/or MIL ON due to aftermarket oil bath air…
- 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…
Transmission and drivetrain: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2009 | 9 | 6% |
| 2008 | 8 | 11% |
Other parts of the 2009 Pontiac G8
69 complaintsElectrical system
20 complaintsSuspension
20 complaintsBrakes
9 complaintsExterior lighting
7 complaintsElectronic stability control
6 complaintsSteering
6 complaintsTires
6 complaintsFuel system
5 complaintsSeats
5 complaintsSeat belts
4 complaintsBody and structure
4 complaints
← All problems reported for the 2009 Pontiac G8
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