I just got a GMC Savana 1500 1/2 ton 5.7L van from a family member. It's in great condition, but when I drive it around the driver seat slides forward when I brake and backward when I accelerate about 1/8 of an inch. None of the other seats do this and I can't figure out where the play is at. Has anyone else had this problem and know what needs to be tightened? Thanks!
