FRONT DIFFERENTIAL LUBRICANT FOUR-WHEEL DRIVE

VEHICLES AFFECTED: 1983-1985 T Trucks ------------------

Some confusion may exist concerning the lubricant specifications for the front differential on four-wheel drive 'T' Truck Models. As stated in the Owner's and Driver's Manual, the correct lubricant specification is SAE 80W-90 GL-5. The GM part number for this lubricant is 992867.

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.