2008 Pontiac G8 engine NHTSA complaints: Engine

NHTSA — Engine Problems


really awful
Crashes / Fires:
0 / 1
Injuries / Deaths:
1 / 0
Average Mileage:
47,300 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 engine problems

engine problem

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2008 Pontiac G8 Owner Comments

problem #5

Aug 102016


  • 94,000 miles


The contact owns a 2008 Pontiac G8. While driving 40 mph, the check engine indicator illuminated. The dealer diagnosed that the timing chain was stretched and needed to be replaced. The vehicle was not repaired. The failure mileage was 94,000.

- Milwaukee, WI, USA

problem #4

Feb 012010


  • miles
The contact owns a 2008 Pontiac G8. While driving approximately 70 mph, the vehicle stalled and the check engine warning light illuminated. The vehicle was taken to the dealer where it was repaired on several occasions, yet the failure kept recurring. The vehicle also exhibited multiple failures with the ignition switch and electrical system that recurred intermittently. The manufacturer was made aware of the failures. The failure mileage was unknown.

- 956-792-2668, TX, USA

problem #3

Nov 252014


  • miles
I am investigating a fire, the cause of the fire was a 2008 Pontiac G4. After the owner drove the car he parked it in his garage. Within 20 min. Of parking the car it was on fire in his garage. The fire looks to have started in the engine compartment of the car. This fire burned his house down and injured him. I am looking for any information that I could use in my investigation involving fires related to Pontiac G4 2008 models.. this information will be used for fire dept use in confirming the cause and background of the fire. Any help will be appreciated. Please email me anything you may have related to this model car involved in fires to : [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Prosperity, SC, USA

problem #2

Jul 162013

G8 8-cyl

  • 82,500 miles
Upper radiator neck snapped off of radiator, allowing upper radiator hose to separate from radiator. All coolant escaped causing engine to immediately overheat. "engine extreme overheat" light on dash came on. GM says not covered under warranty. This is evidently a common problem with these cars, and the similar 2004-2006 GTO as evidenced by all the threads on the subject on grrrr8.net and G8board.net. This should be a recall. Just glad this did not happen on the highway as coolant between the tires and the road would have caused a messy wreck.

- Garland, TX, USA

problem #1

May 182013

G8 8-cyl

  • 60,000 miles
The contact owns a 2008 Pontiac G8. The contact stated that while driving 50 mph, the vehicle stalled without warning. The failure recurred twice. The vehicle was towed to the dealer for diagnosis, but the dealer was unable to duplicate the problem. The vehicle was not repaired. The manufacturer was not notified. The approximate failure mileage was 60,000.

- Albany , NY, USA

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