I have been having this issue on and off for 6 mos. Until Memorial Day weekend, I never had an instance in which the car didn't start after I backed off and tried again - granted sometimes it took a couple tries, but it always started.
Memorial Day weekend - i think we got it to start by shear luck.
I took it to a shop without checking here - they recommended a new battery based off their tests. Since it is a 2006 and I have 56k miles, I figured okay but didn't think that was the true fix.
10 days later, it did it again. I took it back to the shop. They ran more tests and this time they said it was bad starter and I replaced the starter. Well, it did it again last night and this time I gave it gas on the third try turning it over and it started. Went home and started googling and found this thread.
I've called a few GM dealers and other shops. I've been told everything from a bad ignition system to a bad fuel pump to bad sensors. Everyone wants to runs diagnostic tests to determine the issue, but I don't have any error codes on the dash or anything like that.
I'm just wondering if anyone has had the same issue and found the cause to be something other than a dirty throttle body or EGV valve since the three GM dealerships I have called dismissed those as a potential cause.
I would like to apologize for the issues that you have experienced with your vehicle. I would strongly suggest that you take your vehicle into a Certified Pontiac Service Center. They will be in the best position to diagnose your vehicle properly. If you need assistance locating a certified dealership you can follow the link below and enter your zip code. Please keep me posted on the outcome of your visit to the dealer. Also, if you have any other questions, comments or concerns please feel free to contact me.
Stacy GM Customer Service