Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2005 Pontiac G6 owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2005 Pontiac G6. The contact stated that while driving at an undisclosed speed, he became aware that the brake lights had remained illuminated after braking. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number 14V252000 (Electrical System, Exterior Lighting, Vehicle Speed Control, Electronic Stability Control). The VIN was included but had already been repaired. The manufacturer was not notified of the failure. The failure mileage was 200,000.
A few months ago, I was pulling out of a parking lot and started to brake , but my car was not stopping. I quickly pumped my brakes and then my brakes worked. All my brake lights came on; ABS, BRAKE, TC, Check engine; and car maintenance light all came on. They periodically would go away but would return when it rained, or if the brakes gave out. Brakes have gone out twice, once while driving on freeway. Before this issue, I had taken it to a mechanic as the brake light was on, and the 'brake fluid' message was on my dash- the mechanic scanned it and said the BCM was malfunctioning, to take it to the dealership. I knew who bought the car originally off the lot, so I knew the specific dealership it was bought from (gmc dealership). When I called and told them the issue, they said they will not touch my car (exact words). …
My steering wheel started twitching and there's Minimal steering. While driving down the road, the steering wheel twitches with lots of slack and no really control. When you turn the car off and back on power steering comes on in message center on radio and car with wrench on dash comes on and steering wheel gets extremely hard to turn. But if you turn the car on and off again then steering wheel gets loose and twitchy again with no control. Electrical, all my relays and curcuits Have low voltage or high voltage showing on a computer scanner.
While driving on the highway and approaching her exit, the electronic power steering failed and completely locked on my client's car. This is a downhill exit ramp off the highway. Her car pulled to the right and she was unable to steer her car left to follow the curvature of the exit ramp. As a result the car veered off the exit ramp, struck a pole and began to spin out of control. The car continued to spin down into the embankment and came to rest after landing on its side. The car stopped on the driver's side wheels as if it was about to roll over. The car eventually fell down on all four wheels and was facing oncoming traffic. There was a recall issued on the electronic power steering but parts to correct the problem were not made available to my client.
Power steering motor and the electronical control stabilizer the steering wheel is hard to turn because it malfunction and I know you'll have a recall for that I took it to a mechanic and he said that's what it is he hooked the computer up to it he even told me that there is a recall I should contact GMC.
I own a 2005 Pontiac G6 which I purchased from a dealer after it had been leased for 1 year. The vehicle had 12000 miles on it when purchase. Numerous problems have occurred with this vehicle after purchase. Starting with a noise, clunk in the steering. This has been in the repair shop for upwards to 7-8 times, each time new repairs done on different parts. This problem has never been resolved. Now at 64500 miles the noise is still there after repairs only 4000 miles ago. Starting in October of 2007 I began having problems with the brake lights and cruise control. Brake lights working only sporadically as well as the cruise control. There has been documented repairs on the is of 7-8 times as well. This problem also has never been resolved. On September 17, 2008 my car was involved in a rear-end automobile accident in most part and no doubt due to faulty brake light system. …
2005 Pontiac G6 - water pours from the interior lights splashing the inside of the car and driver which is as unexpected as a child running in front of a vehicle. The sudden downpour May cause the driver to loose control of the vehicle when they look up to see where the water is coming from.. Nobody was injured in my incident however, the water is coming from the drain tubes from the top of the car which have a tendancy to become disconnected. I am told this is not considered a safety hazard but a driver does not expect to be suddenly soaked by water when driving a car and can cause the driver to become reckless which May cause damage or injury to a vehicle or a person if it has not already. This is a common problem and needs to seriously considered as a safety hazard. …
Tl* the contact owns a 2005 Pontiac G6. While driving 60 MPH and depressing the brake pedal, the steering and brake pedal shook violently. In addition, while driving, the vehicle stalled without warning and the ignition switch beeped as if the key was inserted in the ignition switch. The vehicle was taken to the dealer, but was not diagnosed or repaired. The contact received notification of NHTSA campaign numbers: 15V153000, 14e044000 (steering) and 14V252000 (electrical system, electronic stability control, exterior lighting, service brakes, hydraulic, vehicle speed control). The manufacturer was made aware of the failure. The failure mileage was 185,598.
Tl* the contact owned a 2005 Pontiac G6. While driving at 50 MPH, the vehicle stalled and the vehicle rolled over multiple times into a ditch. The air bags failed to deploy. The contact sustained neck and shoulder injuries that required medical attention. A police report was filed. The vehicle was destroyed. The manufacturer was notified of the failure. The VIN was included in NHTSA campaign numbers: 14V252000 (electrical system, electronic stability control, exterior lighting, service brakes, hydraulic, vehicle speed control), 14V153000 (steering), and 14V224000 (power train). The failure mileage was unknown.
My Pontiac has had a leak for 6 yrs basically since I had it and before that. I didn't think nothing of this but after a while of the sunroof leak it causes corrosion on the electrical terminals in the wire harness inside the dash on driver door side. This corrosion cause your car to throw PCM/tac codes : p0601,p0606,o0107. Causes car to complete stall out and go into reduced engine power mode. This can be extremely unsafe. I am not the only one there is a few hundred people who posted on sites trying to fix the same issue. Please look into this a lot of people don't know about this NHTSA to report recalls.
NHTSA investigations
Stop lamp malfunction
GM notified the agency by letter dated January 28, 2009, that it will conduct a safety recall of Pontiac g6 vehicles built from January 3 through January 31, 2005.vehicles produced during this time period have shown a highly elevated incident rate of improper operation of the brake lamps.
Electrical complaints in other G6 years
Frequently asked questions
How common are electrical problems on the 2005 Pontiac G6?
NHTSA has 86 complaints about the electrical system of the 2005 Pontiac G6, 13% of the model year's 679 complaints. The component named most often is ignition (4 mentions).
Is there a recall for 2005 Pontiac G6 electrical problems?
No. NHTSA lists no electrical system recall for the 2005 Pontiac G6, though it has 5 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2005 Pontiac G6 electrical problems start?
Half of the complaints with a recorded mileage happened before about 90,000 miles, and 14% before 25,000 miles.
Is it dangerous?
Owners linked 6 crashes, 1 fire and 4 injuries to electrical system 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.