(D)Oil Canning/Popping Noise

Condition: I

Oil canning/popping noise noted during normal vehicle operation (1988-89 vehicles).

Marketing VIN
Division Breakpoint

Pontiac KF206642

Cause:

Normal internal fuel tank pressure results in oil canning noise.

Correction:

Replace fuel tank with new service tank, P/N 12516117, that has additional ribbing on upper and lower tank sections (Reference Bulletin 89-6-17)

Condition: II

Thumping/squawk noise from rear of vehicle, and most apparent when operated at low speeds over irregular road surfaces.

Cause:

A load spike caused by the strut jounce bumper system transmitting noise through the body strut tower structure.


Correction:

Replace both rear strut jounce bumper assemblies with new assemblies contained in service unit, P/N 22063945 (Reference Bulletin 92-3-5A)