LOW OIL PRESSURE THM700-R4 DIAG.PUMP CAVITATION NOISE

MODELS: LIGHT DUTY TRUCKS WITH THM 700-R4 TRANSMISSION

When diagnosing low oil pressure or oil pump cavitation noise on a THM 700-R4 transmission, check the following items:

INSPECT

1. Oil Filter "O" ring for nicks or cuts. Replace with part number 8619568 if necessary.

2. Oil filter body for hairline cracks and neck for flash or blockage. Replace with part number 8642933 if necessary.

3. If the oil filter shows signs of wear at the point it contacts the oil filter retaining clip, replace the filter with part number 8642933 and the chp with part number 8642422 if necessary.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.