2008 Pontiac Grand Prix Vehicle speed control Problems
- Complaints
- 9about this part
- Share
- 6%of 143 total for the year
- Median mileage
- 105,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 9 complaints about the vehicle speed control of the 2008 Pontiac Grand Prix, 6% of the 143 complaints for this model year. Where a mileage was given, the median is 105,000 miles.
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 was driving on the highway and exiting on a ramp. The ramp was on an incline. My driving speed around 45 MPH. Then, unexpectedly, the speed decreased to 30 MPH and immediately the reduce engine speed light came on. Shortly after, my check engine light came on. I continued on my exit, pulled over and parked. After car being off for 30 minutes, the car started right back up. The reduce engine speed light went off but the check engine light remained. I purchased my car in feb 2014 and this was the very 1st incident. …”
NHTSA complaint #10639839, filed 2014-09, 92,000 miles“My Grand Prix recently started to display a message stating reduced engine power. It has been happening randomly for the past week. It only happens as I am driving the car. The car slows dramatically, and does not accelerate at all. As I was driving yesterday, I was merging into traffic where the speed limit is 45 MPH, I had more than enough room to merge into traffic, the reduced engine power message displayed and the car would not accelerate. The traffic quickly caught up to me and I was almost hit due to the car not accelerating. …”
NHTSA complaint #10759941, filed 2015-08, 133,700 miles“Driving on the highway or anywhere, it happens every other day. The information message center chimes then the check engine light comes on the car slows down to 25mph. When I am on the highway this is very dangerous. I have taken it to 3 different service stations, the last 2 dealerships. All the codes are throttle related and I get the car back after a week or 2 and the same thing happens again. No one can fix it. I have emailed GM they did not respond to my email. I attached all the service records with the email hoping they would be able to help. …”
NHTSA complaint #10730136, filed 2015-06, 105,000 miles“Engine power reduced warning light came on and car has minimal acceleration not allowing to go over 40 MPH. Antilock break and traction control lights both on. Breaking issue when this happens causing breaks to hesitate. All issues listed happen while in motion on city street & highway, while going straight & turning and when breaking.”
NHTSA complaint #11326033, filed 2020-05, 208,000 miles“Reduced engine light keep coming on while driving and the vehicle lose power when try to accelerate. This has been going on for about 3 years now on and off. We have brought the vehicle to get repaired multiple times and the problem continues. The throttle body has been changed and also sensors but the problem continues.”
NHTSA complaint #10766222, filed 2015-09, 120,000 milesVehicle speed control: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2008 | 9 | 6% |
| 2007 | 7 | 3% |
| 2006 | 9 | 4% |
| 2005 | 5 | 3% |
| 2004 | 18 | 4% |
| 2003 | 3 | 3% |
| 2002 | 7 | 2% |
| 2001 | 9 | 3% |
| 2000 | 8 | 2% |
| 1999 | 8 | 2% |
| 1998 | 11 | 2% |
| 1997 | 16 | 2% |
| 1996 | 5 | 6% |
| 1995 | 13 | 8% |
| 1994 | 18 | 8% |
| 1993 | 1 | 1% |
| 1992 | 5 | 4% |
| 1991 | 5 | 3% |
| 1990 | 3 | 2% |
| 1989 | 2 | 1% |
Other parts of the 2008 Pontiac Grand Prix
43 complaintsExterior lighting
30 complaintsAir bags
22 complaintsEngine
19 complaintsTransmission and drivetrain
18 complaintsBrakes
12 complaintsSteering
9 complaintsBody and structure
6 complaintsEngine cooling
5 complaintsFuel system
5 complaintsOther or unknown
4 complaintsTires
3 complaints
← All problems reported for the 2008 Pontiac Grand Prix
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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