2008 Pontiac G6: engine stalls while driving

Filed Apr 8, 2026 · Fuel system · TX

Fuel pump defective, return hose onto the top of fuel pump starts to leak fuel.Which can led to car stalling out from not having the correct fuel pressure which caused the engine to stall everywhere,the road,fire hazard,etc.

Filed May 1, 2022 · Electrical, Transmission · WI · crash

No SE lights on dash. Shudder shifts intermittently between all gears both in automatic and manual driving mode. No shops have been able to diagnose what the actual problem is. Huge safety risk as there is no telling when it will actually happen and “stall” the car out in traffic when shifting. In searching the internet this is a common problem for 5+ years and there has not been a solution identified by GM.

Filed Apr 24, 2017 · Electrical, Engine · 98,000 miles · MI

Tl* the contact owns a 2008 pontiac g6. On various occasions, while driving, the vehicle stalled. On one occasion, while driving 65 MPH, the vehicle shut off in the middle of the highway. The contact was able to restart the vehicle. On another occasion, while driving 5 MPH, the starter engaged independently and the check engine warning indicator illuminated. The contact was concerned that due to the starter engaging independently, the vehicle could catch fire. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was 98,000.

Filed Dec 5, 2015 · Fuel system · 117,000 miles · TX

No acceleration of the car over 40 MPH and would suddenly turn off while driving this was both in the city and highway. Strong fuel smell. Leakage underneath the car. Upon dropping the fuel tank there was fuel spilled and accumulated everywhere.

Filed Jan 22, 2015 · Steering · 105,000 miles · PA

Tl*the contact owns a 2008 pontiac g6. The contact stated that while driving at approximately 70 MPH, the power steering warning light illuminated. The vehicle stalled. The failure recurred several times. The vehicle was taken to a dealer. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was 105,000.

Filed Dec 6, 2014 · Driver assistance, Engine · 139,500 miles · NY

Car is a 2008 pontiac g6 gxp - the car is called cybil due to it's issues going on one day and not the next. I bought the car brand new with 128 miles on it. Latest activity is the engine light coming on and the radio screen scrolling low engine power and service ESC. If you turned the car off then back on a few minutes later it would seem to run right, engine light would stay on and 3 cycles later go off. Once off it would stall and lights and messages would go off again. This happened for 10 days in a row and on the 10th day the car stalled out completely on busy main road in the middle of rush hour. Managed to get the car started, moved off the road, and towed to a certified dealer. Dealer took 3 hours ($360) to run diagnostics on the car due to generic code of p0651 showing up. At time dealer moved the car into their facility all the warnings and lights had already reset and didn't present themselves. Diagnostics showed history codes for the brake peddle sensor (which has gone off before and was an issue before the recall notice and other $$ spent figuring out why tail lights went on and off at their own will) other was cam shaft sensor (which I see other complaints on) and throttle body sensor which I see no complaints on. There are service bulletins for the cam shaft sensor for the 2.2 and 2.4, but not the high feature l7y - this is a safety issue and if gm knows the sensors are shifting and pushing into something this needs to be recalled to fix. I am lucky I wasn't on the highway when one of these stalling issues happened. Car is currently at dealer waiting on parts to arrive to the tune of $700 - no christmas thanks to gm. The brake peddle sensor should be included in the recall for the tail lights and it is not. Please open an investigation into the cam sensor issue and make them extend the brake light recall to include the peddle sensor!

Filed Dec 2, 2014 · Electrical, Engine · 156,000 miles · MO

Tl* the contact owns a 2008 pontiac g6. While driving approximately 60 MPH, the reduce engine power light illuminated and the vehicle stalled. The dealer stated that the computer box failed. The manufacturer was notified of the failure. The failure mileage was 156,000.

Filed Aug 11, 2014 · Acceleration, Electrical · 135,000 miles · KY

To sum it up started getting "engine power reduced" message from message center in vehicle. Shortly afterward the vehicle will begin flashing the traction control off light and shifting hard. Now the vehicle still shifts hard with the two above messages and is also stalling out when "engine power reduced" message appears. Many times after this the vehicle will not accelerate at all. Have to pull off the road, cut the vehicle completely off for a few minutes and then continue driving. Problem started intermittent and now happens every single time I drive the vehicle. I have had it stall out on the highway going over 50 MPH, very dangerous was almost hit. Vehicle has been at the used lost service center three times, no luck on finding problem or repair. Car has been with my local gm certified dealership for 3 days and still no proper diagnosis problem or repair. Has sense received the two recall letters bcm/transmission but dealership is reluctant to repair because they said gm may not pay for time and parts. Worse car purchase I have every made.

Filed Jul 19, 2014 · Airbags, Engine · 140,000 miles · IL · crash

I was driving down the road and all of a sudden my car jerked to the right and put me and my kids into the ditch. This has happened twice. The second time it did it in the same direction(right) but when I hit the ditch smoke was coming into the heat vents while my kids were in the car. Brought it to the dealership they told me that my power steering line was broke and also I had a major oil leak and that it was a fire hazard. They then told me the price of how much to fix it. It is no longer under warranty. I don't feel I should have to pay for something that seems to be factory mistake. I've also had an incident of my car shutting off while driving. The ignition turned off while driving only going around a corner. I only had three keys on my ring at this time. This car has been the most dangerous car I've ever owned. The brakes and oil light constantly come on. The air bag light has been on since for over several thousand miles. Also the tire psi sensors are always going bad. The hazard switch hasn't worked in over two years as well. But every time I brought the car in even with a warranty they never fixed any of these problems. What's it have to take for this company to make this car safe?? Dos to make my to fix their mistakes seems like someone's going to have to get in a fatal accident for something to be done. Also my back left seatbelt locked up on my son squeezing him and it wouldn't release. The belt had to be cut to get him out.

Filed Jul 2, 2014 · Acceleration, Engine · 70,000 miles · MI

Driving and suddenly engine light came on, across the radio it said engine power reduced and service traction. It would barely accelerate. It has done this twice in a week. Then after a while the engine light goes off and it will seem ok. At stops though, the car seems very shaky, feeling like it will stall, but hasn't yet!!!

Filed Jul 1, 2014 · Electrical, Engine · 67,000 miles · KY

Tl* the contact owns a 2008 pontiac g6. The contact stated that while driving approximately 35 MPH, the check engine sensor light suddenly illuminated and a chime sounded before the vehicle stalled. The vehicle was restarted and functioned normally but the gauges were inoperable. The vehicle was not diagnosed or repaired. The manufacturer was not notified. The failure mileage was 67,000.

Filed May 26, 2014 · Electrical, Fuel system · 65,000 miles · OK

In august of 2013, I noticed a strong gas smell when standing towards the back end of my g6. The problem was a bad fuel pump. Mileage was ~58,000. A few weeks later, my car began stalling and the charcoal canister had to be replaced. It is now may, 2014 and I've had my car back to the dealership for fuel system related issues five times. They've replaced the fuel pump and charcoal canister a total of three times and they even replaced the gas tank during round three. After the most recent repairs, I get "check gas cap" messages on my radio console every time I fill up, my check engine light comes on and I have acceleration issues. I'm just waiting for it to stall on me again and I pray it doesn't happen again on an on ramp. All repairs are documented through the dealership. In april, both low-beam headlights began working sporadically and within a week, quit working completely. I went to a shop close to the office and paid $50 to have both low-beam bulbs replaced. After about three weeks, the driver's side bulb was out again. I returned to the shop and they took the head lamp out and showed me that the problem was in the wiring harness of the head lamps. The wiring had become so hot, the wire insulation had melted off and the wires are exposed causing a short and blowing the bulbs. I'm now concerned that the electrical issues are more widespread and could be contributing to the continued problems with the fuel system. The dealership has been great to work with, but if the manufacturing dealership can't resolve these issues, I'm not hopeful that my car will ever run correctly again. I feel I have a great looking, unreliable lemon that adds a great deal of stress to my life. I can't afford a new car and I hate that I don't feel like I can go very far from home out of fear of ending up stranded or I won't make it home before the sun goes down.