did you end up finding out what it was? my buddy has the same exact issue..we've done everything, still cant figure it out..thanks!
Check for recalls....got a recall notice in the mail a few weeks ago - sorry for bumping old thread just don't want someone to have same issue and go nuts like I did
Owner:
Chataboutcars.com
The-blacklist.org 2007 GP GXP LS4