6.0

fairly significant
Typical Repair Cost:
No data
Average Mileage:
144,000 miles
Total Complaints:
1 complaints

Most common solutions:

  1. not sure (1 reports)
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problem #1

Apr 112009

Grand Prix GTP 3.8L Supercharge

  • Automatic transmission
  • 144,000 miles

I have a Pontiac Grand Prix GTP 99'. The car shifts great 1-2 2-3, but it wont go into overdrive. When i'm traveling down the road at 60mph the engine runs at 2500rpm's. It's a real bitch on gas and nobody can tell me what to do to fix it.

- supercharged_gtp99, Marengo, IA, US

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