TRANS FLUID USAGE/INFORMATION 5 SPEED MANUAL (RPO MT8)

Subject: CORRECT TRANSMISSION FLUID USAGE

Model and Year: 1991-92 C/K AND P3 TRUCKS WITH 5-SPEED MANUAL TRANSMISSION

The NV4500, 5 speed manual transmission (RPO MT8) requires the use of a special synthetic lubricant (P/N 12345871). This special lubricant is required to reduce transmission internal operating temperatures and is installed in all NV4500 transmissions in production. The synthetic lubricant does not require periodic changing. If it is necessary to drain and refill or add fluid to the transmission, do NOT substitute any other lubricant. Installation of other lubricants may result in internal transmission damage.

SERVICE PARTS INFORMATION

P/N Description --- ----------- 12345871 Fluid, Manual Transmission (CASTROL SYNTROQ GL4) (1 gallon)

Parts are currently available from GMSPO.

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.