GM Service Manual Online
For 1990-2009 cars only

The front engine crossmember mounts rigid to the body without rubber insulators.

The rubber mounts and bushings isolate the rear axle cradle from the vehicle body. An improper insulation mount and/or improper bushing installations may result in the following problems:

    • May result in popping noise.
    • May result in structure shake.
    • May result in road noise.
    • May result in squeaks.
    • May result in snapping noise.

Installation of the wrong part may cause the above problems or improper tightening of the insulator may cause the above problems.

If the problem is diagnosed as an insulator problem check that the body bolt is at proper torque specification. Refer to Fastener Tightening Specifications in rear suspension. If the wrong insulator was used, replace the insulator with the correct part number. Use new installation bolts, and tighten to proper torque specification. Refer to Frame Bushing Replacement in rear suspension.