OIL LEAK TRANSFER CASE/O RING SERVICE PROCEDURE. GMC Truck S15 Pickup - 4WD 1983

For 1990-2009 cars

# OIL LEAK TRANSFER CASE/O RING SERVICE PROCEDURE

#### MODELS: 1982-83 LIGHT DUTY FOUR-WHEEL DRIVE MODELS WITH THM 700-R4 TRANSMISSIONS AND 207 TRANSFER CASES

Some 1982 and 1983 THM 700-R4 transmissions may exhibit an oil leak at the transmission case to transfer case adapter area on some vehicles. This oil leak may be caused by a lack of compression of the "O" ring seal used on the transfer case adapter.

When servicing any 1982 and 1983 four-wheel drive vehicle equipped with a THM 700-R4 transmission for an oil leak at the transmission to transfer case adapter area, install "O" ring, P/N 15590103, on the transfer case adapter to correct the oil leak.

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.