My girlfriend has an older pontiac grand prix and she had this problem really bad. It is the park cable, her brother rigged it with some cable that runs into the ignition switch. It is rigged so that when you push up on the cable it will release the key.. dont ask me how he worked that out but it seems to be a fix lol. Hoping mine doesnt come to that!
2008 G6 Gxp Street Edition
Mods:Interior LED Neon Lighting, Debadged, 20% Tint, Flowmaster 40 Series Exhaust, Res delete, Alteza black housing taillights, Spyder black housing headlights, CRAB O3 CAI, Airraid Throttle Body Spacer, Racingline Strut bar, 91 OCT WAMS Tune.
Audio:400.1 Kicker amp, 12" Kicker CVR Ported Box