I currently have a 2008 Grand Prix with a 3.8L V6. The car has had problems during the summer and winter with not starting. The engine will crank and the engine starts for a second and then sputters and dies. We checked fuel pressure with a gauge and found that there was no fuel pressure. We had the dealer replace the fuel pump. The next day, the car started no problem but refused to start after we came back from work. I wiggled the fuel relay in the fuse box and the fuel pump relay in the trunk and was able get fuel pressure and get the car to the dealer. They held it for three days and replaced the fuel relay in the fuse box. I just got it back and parked it on my driveway(which has an incline). I then decided to move it to allow another car in the drive way a minute after I turned it off and it refused to start. I wiggled the fuel relay and put a fuel pressure gauge on (no fuel pressure). I also didn't hear the relay for the fuel pump in the trunk start up. The fuel pump and the fuel relay in the fuse box have been replaced. Any help in this matter would be greatly appreciated.