GM Service Manual Online
For 1990-2009 cars only

Three-Dimensional Method

The repair equipment for measuring structural repair must be capable of measuring multiple points of length, height and width at the same time. Also you must measure 2/3 of the vehicle body to obtain accurate comparisons to the vehicle structure.

Universal measuring system combine the equipment and the techniques used to make the underbody and the upperbody three-dimensional measurement of length, width and height measurements at the same time.

Frame

Vehicles involved in an accident of any nature which might result in a bent or sprung frame should always be checked for proper frame alignment.

Frame-To-Body Alignment

Check the frame-to-body alignment by inserting a 19 mm (3/4 in) diameter guide pin or drill bit into the frame-to-body guide pin holes. If the guide pins will not fit the frame the frame is not in correct alignment with the body. To realign the frame refer to Frame.