Which parts fail
Components named in complaints (accelerator pedal, throttle, sudden acceleration, cruise control).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2008 Pontiac G6 owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2008 Pontiac G8. The contact stated that while driving approximately 80 mph the cruise disconnected had erroneously deactivated and the brake lights had remained illuminated . The contact replaced brake sensors, emergency brake sensors and ABS Module but the failure continued to occur. The local dealer was notified of the failure but no assistance was offered. The manufacturer was not contacted. The contact was informed of the NHTSA Campaign Number: 14V252000(ELECTRICAL SYSTEM, EXTERIOR LIGHTING, VEHICLE SPEED CONTROL, ELECTRONIC STABILITY CONTROL (ESC). The contact indicated that the vehicle had experienced that same failure listed in the recall. The failure mileage was 94,000.
The contact owns a 2008 Pontiac G6. The contact stated that the vehicle was previously repaired under NHTSA Campaign Number: 14V252000 (ELECTRICAL SYSTEM, EXTERIOR LIGHTING, VEHICLE SPEED CONTROL, ELECTRONIC STABILITY CONTROL (ESC); however, the failure recurred after the recall repair. The vehicle was taken to the dealer but was not repaired. The manufacturer declined to provide additional repairs under the recall. The manufacturer was notified of the failure. The failure mileage was 115,000.
The catalytic converter in my car needs replacement. I have been the only owner and have maintained it properly. The car has a little under 67,000 miles and occasionally loses power. It is a major safety issue as this happens sporadically. I can not with 100 percent certainty merge into traffic knowing that it will accelerate fast enough. I had a diagnostic run on the car and was told that the catalytic converter is the issue and needs replacement. I contacted the dealership in el paso, tx and they claim that some Pontiac G6 models (based on VIN) have been recalled, but that mine is not one of them. I have looked up related cases and don't understand why my car's VIN is not included. I love my car and it has served me well, until now. I hope that someone, anyone with some authority is reading this. …
Takara recall I was on my way to a store driving and my car started shaking and so I got of the interstate and it starting acting like it was losing power so I pulled over shut it of for a hr and turned it back on tried to go in reverse nothing happened tried to go in drive nothing happened it didnt yo anywhere so I put 2 quarts of transmission fluid in it then it would go in drive but no reverse. I brought it to a garage and a ton of codes came up they cleared it and told me not to worrie about it but it smelt weird and I new something was wrong.I believe it has something to do with the transmission cables and a throttle sensor because it was acting like it wanted to go fast n the throttle would accelerate when I didnt push more on the paddle kinda like it was stuck in cruise control but even when I press the brakes it still rev.
Tl* the contact owns a 2008 Pontiac G6. The contact stated that the vehicle was repaired per NHTSA campaign number: 14V252000 (service brakes, hydraulic, electrical system, exterior lighting, vehicle speed control, electronic stability control) prior to her owning the vehicle. The contact stated that the remedy failed to repair the vehicle. The contact stated that the brake lights remained illuminated even when the brake pedal was not depressed. The vehicle was taken to superior Chevrolet conway (1275 exchange ave, conway, ar 72032, [phone]) where they replaced the brake lamp switch and front wheel drive axle shaft seal, but the failure recurred. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 146,000.
Tl* the contact owns a 2008 Pontiac G6. While driving at any speed, the brake lights remained illuminated regardless if the brake pedal was depressed or not. In addition, the traction light illuminated. The failures occurred continuously. The VIN was excluded from NHTSA campaign number: 14V252000 (electrical system, electronic stability control, exterior lighting, service brakes, hydraulic, vehicle speed control). The approximate failure mileage was 76,000. Updated 08/30/16 the consumer stated the brake either illuminate all the time, or they do not illuminate at all. The electrical system would go haywire. The seat belt alarm sounded even when it was un-buckled, the traction control light illuminated and so did other random lights. Updated 10/26/16.
Tl* the contact owns a 2008 Pontiac G6. While driving various speeds, the brake lamps illuminated without the brake pedal being depressed. When the brake pedal was depressed, the brake lamps failed to illuminate. The vehicle was taken to a dealer where it was diagnosed that it needed to be repaired per NHTSA campaign number: 14V252000 (electrical system, electrical stability control, exterior lighting, service brakes, hydraulic, vehicle speed control). The vehicle was repaired; however, the failure recurred. The vehicle was taken back to the dealer, but was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 80,000.
Tl contact owns a 2008 Pontiac G6. The contact was backing out of a parking space. Unexpectedly, there was a forceful increase of acceleration. The vehicle failed to slow down and crashed into the driver side door of an opposing vehicle. The police and ambulance were called to the scene. There were no personal injuries. The vehicle was driven to the residence. The vehicle is in the process of being repaired for the body damages at an estimated cost of $2,000.00. The failure mileage was 46,000. Updated 4/28/10 the consumer stated the accelerator pedal became stuck. Updatd 06/25/10.
Tl* the contact owns a 2008 Pontiac G6. While driving at an unknown speed, the power steering suddenly malfunctioned and caused the steering wheel to become very difficult to turn. The vehicle was turned off operated normally the following day. The contact also indicated that while driving at various speeds, the vehicle would suddenly stop accelerating when pressing the accelerator pedal. The failures were not diagnosed or repaired. The manufacturer was not notified. The failure mileage was 95,000.
I was driving and my car started to reduce speed, hesitate, and jerk when put my foot on the gas at a light to pull off or even with my foot on the gas pedal driving. My car couldn't pick up speed past 25 miles and sometime less. A message came up on my dash board stated flashing reduce engine speed. I was near auto zone when it happened so I asked to have a dianostic completed and it stated throttle/ pedal position sensor/ switch "e" circuit low input meaning code p2127.
Related recalls
Vehicle speed control › Cruise control
General Motors LLC (GM) is recalling certain model year 2004-2012 Chevrolet Malibu vehicles manufactured May 16, 2003, through October 11, 2012, 2004-2007 Malibu Maxx vehicles manufactured June 25, 2003, through April 5, 2007, 2005-2010 Pontiac G6 vehicles manufactured May 26, 2004, through January 4, 2010, and 2007-2010 Saturn…
Remedy: GM will notify owners, and dealers will attach the wiring harness to the BCM with a spacer, apply dielectric lubricant to both the BCM and harness connector and the BAS and harness connector, and will relearn the brake…
Acceleration complaints in other G6 years
Frequently asked questions
How common are acceleration problems on the 2008 Pontiac G6?
NHTSA has 67 complaints about the speed control & acceleration of the 2008 Pontiac G6, 6% of the model year's 1,080 complaints. The component named most often is cruise control (4 mentions).
Is there a recall for 2008 Pontiac G6 acceleration problems?
Yes — NHTSA recall 14V-252 (cruise control, May 14, 2014). Recall repairs are free at authorized dealers.
At what mileage do 2008 Pontiac G6 acceleration problems start?
Half of the complaints with a recorded mileage happened before about 72,000 miles, and 4% before 25,000 miles.
Is it dangerous?
Owners linked 4 crashes, 1 fire and 2 injuries and 1 death to speed control & acceleration problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.