Navigational (global Positioning System) Gps problems of the 2007 Chevrolet Trailblazer

The contact owns a 2007 Chevrolet Trailblazer 360. The contact stated that there were many failures with his vehicle and the dealer does not want to make any repairs. The vehicle was purchased with 83 miles. Firstly, the bumper is wavy rather than horizontal. He took it to the dealer for repair, however, the new bumper causes the vehicle to veer to the side. Secondly, after the tires were rotated, the vehicle began shaking badly. Thirdly, the onstar system began making noise and would not deactivate. Finally, the rubber seal on the windshield began separating and was replaced. The dealer refuses to take the contact seriously. The engine size was unknown. The current and failure mileages were 17,828.