Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2004 Grand Prix starting issue › Re: 2004 Grand Prix starting issue November 11, 2012 at 6:36 am #475984 LukeParticipant [quote=”college man” post=37410]Gm’s are known for intake gasket leaks. Try checking for vacuum leaks. here are two ways to check for vac leaks. I was thinking this could be a possible cause. Thanks! Ill check it out.