My 2008 Grand Prix will stop ahifting gears after I've driven it for about 15-20 minutes . It will slow up . I have to shut off engine let Trans cool then drives normally ? What's needed to repair?

Asked by Jul 23, 2014 at 06:54 PM about the 2008 Pontiac Grand Prix Base

Question type: Maintenance & Repair

1 Answer

4,735

Have the trans serviced, with a new filter and fluid, before trying to diagnose the issue. Make sure that the trans coolant lines are blown out to clear any blockage.

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