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?

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? 1 Answer

I have a 2002 Pontiac grand prix when I get up to 45 miles a hour my front end starts to shake but when I let off gas it stop 3 Answers

When I get to 45 miles a hour the front end starts shaking but if I let off gas it quits

I bought EGR Valve & Catalytic Converter for 2002 Pontiac Grand Prix GT 3.8L with 225k on Friday, Saturday I had it installed, I should of done the EGR myself just I'm not good with those things & didn't know if I replaced the EGR before the Catalytic Converter if that would mess anything up one before the other as I don't want to be stranded. Only thing is after those 2 things were replaced it still runs like crap. Suggestions? I've asked around. I've been told to get it hooked up to a computer. I contacted another mechanic in MN & he told me take the throttle body off & clean well & then replace.??? 8 Answers

I bought EGR Valve & Catalytic Converter for 2002 Pontiac Grand Prix GT 3.8L with 225k on Friday, Saturday I had it installed, I should of done the EGR myself just I'm not good with those things & did...

My 2000 Pontiac grand prix cranks up strong but shuts off after about 3 seconds. I had a brand new fuel pump installed and the car ran fine and i was able to drive it around for a while. 1 Answer

Check engine light came on when I was driving for the short period of time but the car shows no codes. The fuel pressure is normal but drops down when the car shuts off. I had 3 mechanics check i...

have 08 grand prix. sometimes in the morning it just cranks but no start for the first few min. then sometimes while im driving it stalls and wont start back up for about 20 min. no check engine light 1 Answer

fuel pump, tune up, crank sensor, and ignition control moduel have all been replaced and the car is still the same.