JACK RATTLE NOISE WHEN DRIVING ON ROUGH ROADS

VEHICLES AFFECTED: 1988 C/K 10-20 AND 30 SERIES

Some 1988 C/K 10-20 and 30 Series models may have jack assemblies that rattle when driven over rough roads. To repair this condition, the following procedure should be used.

1. Cut one piece of 1/2 inch I.D. x 1-1/2 inch O.D. sponge pipe insulation 2-3/4- inches long as shown in Figure No. 1.

Notice: Sponge pipe insulation is available from plumbing suppliers and hardware stores.

2. Split sponge pipe insulation as shown in Figure No. 1.

3. Install insulation around jack screw as shown in Figure No. 2.

4. Fold jack completely for storage.

This conditon was corrected in production beginning with the following VIN breakpoints:

Chevrolet JE102527 GMC JE500724

Chevrolet JZI01777 GMC JZ500593

Chevrolet J1106538 GMC J1502040

Use the most applicable labour operation from the Canadian Labour Time Guide and claim 0.3 houts.

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.