CAMPAIGN: OFF-ROAD BILSTEIN FRT. SHOCK ABSORBER DURABILITY

Model and Year: 1988 CHEVROLET K10 TRUCKS WITH OFF-ROAD CHASSIS PACKAGE (RPO Z71)

General Motors has determined that some 1988 Chevrolet K10 Trucks equipped with Off-Road Bilstein Front Shock Absorbers (RPO Z71) may have an incorrect valve in the shock absorbers.

During off-road driving, the incorrect valving causes increased loading into the shock valve which may result in premature valve wear.

To prevent the possibility of this condition occurring it will be necessary to replace the front shock absorbers on all involved vehicles.

VEHICLES INVOLVED

Involved are certain 1988 Chevrolet K10 Trucks equipped the Off-Road Bilstein Front Shock Absorbers (RPO Z71) within the following VIN breakpoints:

PLANT FROM THROUGH ----- ---- ------- Oshawa J1133895 J1162889 Pontiac East JE100015 JE131717 Fort Wayne JZ111703 JZ133225

Involved vehicles have been identified by Vehicle Identification Number Computer Listings. Computer listings contain the complete Vehicle Identification Number, owner name and address data, and are furnished to the involved dealers with the campaign bulletin. Owner name and address data furnished will enable dealers to follow-up with owners involved in this campaign.

These listings may contain owner names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle registration data for any other purpose is a violation of law in several states. Accordingly, you are urged to limit the use of this listing to the follow-up necessary to complete this campaign. Any dealer not receiving a computer listing with the campaign bulletin has no involved vehicles currently assigned.

OWNER NOTIFICATION

Owners will be notified of this campaign on their vehicles by Chevrolet Motor Division (see copy of Owner Letter included with this bulletin).

DEALER CAMPAIGN RESPONSIBILITY

Dealers are to service all vehicles subject to this campaign at no charge to owners, regardless of mileage, age of vehicle, or ownership, from this time forward.

Whenever a vehicle subject to this campaign is taken into new or used vehicle inventory, or it is in your dealership or service in the future, you should take the steps necessary to be sure the campaign correction has been made before reselling or releasing the vehicle.

Owners of vehicles recently sold from your new vehicle inventory are to be contacted by the dealer, and arrangements made to make the required correction according to instructions contained in this bulletin.

PARTS INFORMATION

Parts required to complete this campaign are to be obtained from General Motors Service Parts Operations (GMSPO). To ensure these parts will be obtained as soon as possible, they should be ordered from GMSPO on a C.I.O. with no special instruction code, but on advise code (2).

PART NUMBER DESCRIPTION QUANTITY/VEHICLE ----------- ----------- ---------------- 22064020 Shock Absorber 2

SERVICE PROCEDURE

Front shock absorber removal and installation procedure is given in Section 3C-1 "Front Suspension and Axle" of the 1988 C-K Pickup Truck Service Manual Supplement ST-375-88S.

CAMPAIGN IDENTIFICATION LABEL (Figure 1)

Each vehicle corrected in accordance with the instructions outlined in this Product Campaign Bulletin will require a "Campaign Identification Label." Each label provides a space to include the five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or ballpoint pen.

Each "Campaign Identification Label" is to be located on the radiator core support in an area which will be visible when the vehicle is brought in for periodic servicing by the owner.

Apply "Campaign Identification Label" only on a clean dry surface.

CLAIM INFORMATION

Submit a Product Campaign Claim with the information indicated below:

* FAILED PARTS LABOR LAB OTH REPAIR PERFORMED PC PART NO. ALLOW FC OP HRS HRS ---------------- -- ------- ----- -- -- --- --- REMOVE AND INSTALL 2 22064020 ** 00 V4390 0.6 0.1 FRONT SHOCK ABSORDERS

*Campaign Administrative Allowance

**The "Parts Allowance" should be the sum total of the current GMSPO Dealer Net price plus 30% of all parts required for the repair.

Dealers will automatically receive the correct labor and material allowance based on the labor operation performed.

Refer to the Chevrolet Claims Processing Manual for details on Product Campaign Claim submission.

Dear Chevrolet Owner:

This notice is sent to infom you that Chevrolet Motor Division is conducting a recall campaign that includes your vehicle.

REASON FOR THIS RECALL

General Motors has determined that some 1988 Chevrolet K10 Trucks equipped with Off-Road Bilstein Front Shock Absorbers may have an incorrect valve in the shock absorber.

During off-road driving, the incorrect valving causes increased loading into the shock valve which may result in premature valve wear and subsequent shock absorber failure.

WHAT WE WILL DO

To prevent the possibility of this condition occurring, it will be necessary to replace the front shock absorbers on all involved vehicles. This service will be perfomed for you at no charge.

WHAT YOU SHOULD DO

Instructions for perfoming this service have been sent to your Chevrolet Dealer. Please contact your dealer to arrange a service date. The labor time necessary to replace the front shock absorbers in your vehicle will be approximately thirty-five (35) minutes. Please ask your dealer if you wish to know how much additional time will be needed to schedule and process your vehicle.

The enclosed Owner Identification Reply Card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary correction to your vehicle in the shortest possible time. If you have sold or traded your vehicle, please let us know by completing the postage paid reply card and returning it to us.

We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our products.

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.