CAMPAIGN: SERPENTINE BELT TENSIONER - POSSIBLE REPLACE

SERPENTINE BELT TENSIONER

1987 Celebrity, Century, Ciera, 6000 With 2.5L Engine (LR8) VIN Code R.

General Motors of Canada has determined some 1987 Celebrity, Century, Ciera, and 6000 models equipped with a 2.5L engine may experience loss of serpentine accessory drive belt tension. This condition results in loss of accessory drive component operation.

To prevent the possibility of this condition occurring, the serpentine belt tensioner must be inspected for suspect codes and, if required, replaced.

VEHICLES INVOLVED

Involved are certain 1987 Chevrolet Celebrity models equipped with a 2.5L engine (RPO LR8, VIN Code R) and produced within the following VIN breakpoints: Plant From Through ----- ---- ------- Celebrity Framingham HG192299 HG196465 Oklahoma City H6252109 H6269529 Ste. Therese H2100131 H2100416 Ramos Arizpe HS500574 HS501175

Century Doraville HD463600 HD464363 Oklahoma City H6435334 HG438729 Tarrytown HT457075 HT460666

Ciera Doraville HD421411 HD425516 Framingham HG321454 HG322899 Oshawa H9393058 H9404612

6000 Oshawa H9271325 H9278021 Tarrytown HT271248 HT274839

All affected vehicles have been identified by the VIN listing provided to involved Dealers with this bulletin. Any Dealer not receiving a listing was not shipped any of the affected vehicles.

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 your new or used vehicle inventory, or it is in your Dealership for 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 modification according to instructions contained in this bulletin.

CAMPAIGN PROCEDURE:

Refer to Section 4 of the Service Policies and Procedures Manual for the detailed procedure on handling Product Campaigns. Dealers are requested to complete the campaign on all transfers as soon as possible.

OWNER NOTIFICATION:

All owners of record at the time of campaign release are shown on the attached computer listing and have been notified by first class mail from General Motors. The listings provided are for campaign activity only and should not be used for any other purpose.

PARTS INFORMATION:

Parts required to complete this campaign are to be obtained from General Motors Service Parts Operation as follows:

Part Number Description Quantity/Vehicle ----------- ----------- ---------------- 10040810 Belt Tensioner 1 - As Required*

* It is estimated that 33% of the vehicles involved will require tensioner replacement. Order parts accordingly, based on attached involved vehicle listing.

PARTS AND LABOUR CLAIM INFORMATION:

Credit for the campaign work performed will be paid upon receipt of a properly completed campaign claim card, RAPID terminal or DCS transmission in accordance with the following:

Repair Code Description Time Allowance ----------- ----------- -------------- 1A Inspect Only - Tensioner .3 Replacement Not Required Or Vehicle Previously Repaired

2A Inspect Tensioner Code And . 8 Replace Tensioner

Time allowance includes 0.1 hour for Dealer administrative detail associated with this campaign. Parts credit will be based on Dealer net plus 30% to cover parts handling.

SERVICE PROCEDURE:

1. Inspect tensioner code located approximately 5-1/4 inches from top mounting bolt hole for the power steering pump.

If code is 187, 197, 817, or 917, replacement is required. Follow replacement instructions below.

If code is NOT one of the suspect codes listed above, replacement is NOT required, proceed to step 12.

2. Disconnect negative battery cable.

3. Drain coolant into a clean container and save for reuse.

4. Rotate serpentine belt tensioner to release belt tension and remove belt.

5. Remove power steering pump mounting bolts.

6. Remove tensioner.

7. Install new tensioner. Torque bolts to 50 N.m (37 lb. ft.).

8. Reinstall power steering pump. Torque bolts to 27 N.m (20 lb. ft.).

9. Reinstall serpentine belt.

10. With coolant saved in step 3. Refill cooling system to proper level. Top off as required.

11. Reinstall negative battery cable.

INSTALLATION OF CAMPAIGN IDENTIFICATION LABEL

Clean surface of radiator upper mounting panel and apply a Campaign Identification Label. Make sure the correct campaign number is inserted on the label. This will indicate that the campaign has been completed.

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.