Checking Frame Alignment
WARNING: This page is about a different car, the 2005 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.
Inspect the frame-to-body alignment by inserting a guide pin or drill bit into the frame-to-body guide pin holes (1). If the guide pins do not fit, the frame is not correctly aligned with the body. Refer to Frame Replacement in order to realign the frame.