2008 Pontiac G8 drivetrain NHTSA complaints: Power Train

NHTSA — Power Train Problems


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
35,333 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2008 Pontiac G8 drivetrain problems

drivetrain problem

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2008 Pontiac G8 Owner Comments

problem #3

Nov 052014


  • miles


The contact owns a 2008 Pontiac G8. While parking, the vehicle rolled backwards. The contact applied the emergency brake in order to stop the vehicle. The contact shut off the vehicle and it failed to restart. The vehicle was towed to a dealer who diagnosed that the transmission shift cable needed to be replaced. The vehicle was repaired, but the failure recurred. The manufacturer was notified of the failure. The VIN and failure mileage were not available. Updated 01/09/15

- Humboldt, TN, USA

problem #2

Oct 242011


  • 40,000 miles
The contact owns a 2008 Pontiac G8. The contact stated that the front and rear windshields were defective and the glass contained bubbles that caused poor visibility. The contact also stated that the rear defroster no longer functioned. The vehicle was taken to the dealer and the contact was advised that the rear windshield could be replaced at low cost. The contact was also advised that the front windshield was a manufacturer's defect. In addition, the contact stated that the shifter cable had to be replaced and the cruise control did not engage. The cruise control was not repaired because the diagnostic test was unable to locate a failure code. Neither windshield was replaced. The manufacturer denied assistance with the repairs. The failure mileage was 40,000 and the current mileage was 70,000.

- Dundalk , MD, USA

problem #1

Oct 202011

G8 8-cyl

  • 66,000 miles
I was driving down 95 South near baltimore at about 70mph at 7am this morning when my 2008 Pontiac G8 GT (with the L76 6.0lv8 engine) alerted me that the engine was hot. I immediately pulled over and when I popped the hood I saw the upper radiator hose was not attached to the radiator anymore and a lot of coolant had leaked everywhere. Upon closer inspection, I saw that the pastic radiator flange that the hose attaches too had broken off of the radiator and was in the hose. Since the engine cooling system, which I believe is part of the powertrain (GM will try and tell you otherwise) was no longer functioning, I clearly couldn't drive anymore, so I was stranded on the side of a very busy 95. Being stranded is a safety issue, right? besides the immediate warning light/alarm, I had absolutely no prior warning that this was going to happen. It was a sudden and unexpected incident. I did not hear anything before hand. I saw no steam from the hood or anything like that. Nothing. Just the immediate warning light/alarm. Besides an oil change at about 62,000 miles, I have not had any other services since 50,000 miles that would have touched that hose. I have pictures of the hose and the broken flange and I have the broken piece of flange in my possession and the radiator assembly is still in my car if you'd like to see or have any of those pieces. A quick search on the internet shows I'm not the first G8 owner to have this problem. Thank you for your time and I hope to hear from you guys soon!

- Baltimore, MD, USA

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