2008 Pontiac G8 Engine Problems
- Complaints
- 5about this part
- Share
- 7%of 71 total for the year
- Median mileage
- 82,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the engine of the 2008 Pontiac G8, 7% of the 71 complaints for this model year. Where a mileage was given, the median is 82,500 miles. 1 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“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. …”
NHTSA complaint #10661038, filed 2014-11“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.”
NHTSA complaint #10513121, filed 2013-05, 60,000 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.”
NHTSA complaint #10896834, filed 2016-08, 94,000 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.”
NHTSA complaint #10683002, filed 2015-02Related service bulletins
- 11009531Sep 27, 2024This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
- 11008906Aug 19, 2024This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and…
- 11007116Aug 6, 2024This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
- 11007091Aug 5, 2024This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
- 11000119Apr 26, 2024This service bulletin provides technicians with information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
- 10211658May 2, 2022This service bulletin provides policy information on warranty administration guidelines for multiple repairs with independent causes (GM Canada Dealers Only).
- 10205052Aug 20, 2021This service bulletin provides diagnostic aid information/procedures to perform inspections to determine if the engine needs to be replaced as opposed to just internal parts for…
- 10199244May 24, 2021This service bulletin provides diagnostic aid procedure to perform inspections to determine if the engine needs to be replaced as opposed to just internal parts for knocking…
- 10199238May 3, 2021This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.
- 10187751Jan 14, 2021This service bulletin provides diagnostic aid procedure to perform inspections to determine if the engine needs to be replaced as opposed to just internal parts for knocking…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2009 | 3 | 2% |
| 2008 | 5 | 7% |
Other parts of the 2008 Pontiac G8
25 complaintsElectrical system
14 complaintsSuspension
10 complaintsSteering
8 complaintsTransmission and drivetrain
8 complaintsOther or unknown
4 complaintsBrakes
2 complaintsSeat belts
2 complaintsSeats
2 complaintsBody and structure
2 complaintsVisibility (wipers, defrost, mirrors)
2 complaintsElectronic stability control
1 complaints
← All problems reported for the 2008 Pontiac G8
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology