PREMATURE BELT WEAR NEW DAMPENER PULLEY P/N

VEHICLES AFFECTED: 1982-85 C, K, G, P - 1, 2, 3 With 6.2L Diesel Engines

A crankshaft torsional dampening pulley is now being used on the 6.2L diesel engine. The use of this dampened pulley will significantly increase belt life.

This dampened pulley was used in 1985 production beginning with the following VINs.

Plant Chev VIN GMC VIN ----- -------- ------- St. Louis FS 174620 FS 525913

Flint FF 182920 FF 526969

Janesville FJ 169041 FJ 523452

Oshawa F1 222358 F1 544486

*Scarborough F4 165294 F4 524467

Detroit F3 334915 F3 508236

The service procedure for removal and replacement of the crankshaft dampener pulley is in Section 6A7 of the 1985 Light Duty Service Manual.

One of the following dampeners is required in making the installation:

Part Number Model Year ----------- ----- ---- 15592125 P w/Air Conditioning 1982-85 C, K, G w/Air Conditioning 1982-84 G w/Air Conditioning 1985

15592127 C, K, G, P w/o Air Conditioning 1982-85

15592128 C, K w/Air Conditioning 1985

All dampener installations require four bolts, P/N 11508141. The torque for these bolts is 35-45 N.m (26-33 ft. lbs.).

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.