CAMPAIGN: POWER STEERING PUMP BRACE- POSSIBLE REPLACE. GMC Truck S15 Pickup

MODELS:1987 S/T TRUCKS EQUIPPED WITH 2.8L V6 (RPO LL2, VIN CODE R) AND POWER STEERING (RPO N40)

General Motors has determined that some 1987 GMC S/T model trucks may experience fracture of the power steering pump support brace. This condition can in turn lead to possible fracture of the power steering pump mounting bracket and/or loss of the serpentine accessory drive belt. Loss of the serpentine drive belt would result in loss of air conditioning, generator, power steering assist and water pump operation.

To correct this condition, the power steering pump support brace will be inspected and, if necessary, replaced with a new design brace. The power steering pump mounting bracket will also be inspected and replaced as required on all involved vehicles.

VEHICLES INVOLVED

Involved are certain 1987 GMC S/T model trucks equipped with 2.8L V6 engine (RPO LL2, VIN Code R) and power steering (RPO N40) and produced within the following VIN break-points:

MODEL YEAR MODEL PLANT FROM THROUGH ---- ----- ----- ---- ------- 1987 S/T Moraine SSV H2515862 Pontiac SSv H0510375 Shreveport SSV H8518729

The specific vehicles involved in this campaign have been identified by Vehicle Identification Number Computer Listings. These Listings are furnished to all involved dealers with the campaign 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 your new or used vehicle inventory, or it is in your dealership for service in the future, you should take the steps necessary to ensure 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.

If no owner's name and address were available to GMC Truck Division at the time of campaign initiation, the dealer will determine the owner's name and address from the dealership sales records. Please provide this information directly on the second copy of the listing next to the applicable VIN so that our records may be updated and the appropriate notification mailed to the owner. This second copy should then be submitted to the address listed below in the previously supplied yellow campaign envelopes.

GMC Truck Division General Motors Corporation 101 Union Street Plymouth, MI 48170

OWNER NOTIFICATION

Owners will be notified of this campaign on their vehicles by GMC Truck Division (see copy of Owner Letter included with this bulletin). A listing of owner names and addresses has been furnished to the involved dealers to enable dealers to follow up with owners involved in this campaign. This listing 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 this campaign.

SERVICE PROCEDURE

1. Inspect power steering pump brace. If vehicle is equipped with a new design brace (see Figure No. IA and Figure No. 2), no further service is required, proceed to step 9. If vehicle is equipped with original design brace, proceed with steps below.

2. Remove two (2) nuts from power steering pump brace, see Figure No. 1A, and remove brace.

3. Remove lower forward exhaust manifold attaching bolt and replace with stud P/N 10065558, see Figure No. IB.

4. Torque stud to 34 Nm (25 lb ft), see Figure No.2.

5. Inspect power steering pump mounting bracket. If bracket is cracked or broken, it must be replaced. Reference 1987 S/T Service Manual (X-8729) Section 3B3 for power steering pump mounting bracket replacement.

6. Attach new power steering pump brace on power steering pump and manifold studs. Install nuts on pump and manifold studs and HAND TIGHTEN ONLY.

7. Torque nut on rear of power steering pump to 45 Nm (33 lb ft).

IT IS NECESSARY TO TORQUE NUT ON REAR OF POWER STEERING PUMP FIRST TO CORRECTLY POSITION BRACE. AFTER THIS HAS BEEN ACCOMPLISHED, TORQUE REMAINING TWO (2) NUTS TO 28 N m (20 lb ft).

8. Retorque lower power steering pump bracket to water pump bolt to 40 Nm (29 lb ft), see Figure No. 2.

PARTS INFORMATION

Parts are to be obtained from General Motors Service Parts Operation (GMSPO). To ensure that these parts will be obtained as soon as possible, they should be ordered from GMSPO on a C.I.O. order with no special instruction code but order under an advise code (2).

QUANTITY PART NO. DESCRIPTION PER VEHICLE -------- ----------- ----------- 10087543 Brace - Power Steering 1 Pump 10065558 Stud 1 11508279 Nut 1 14092956* Bracket - Power Steering 1A/R Pump Mounting

*It is estimated that only approximately 3.5% of the vehicles involved may require P/N 14092956 Power Steering Pump Mounting Bracket. Please order parts accordingly, based on attached involved vehicle listing.

WARRANTY INFORMATION

Dealers should submit a warranty claim on each vehicle completed under this campaign.

LABOR OPERATION * TIME TROUBLE NUMBER DESCRIPTION ALLOWANCE CODE ------ ----------- --------- ----

V4220 Inspect for new 0.2 hr 96 powersteering pump brace - No further action required V4221 Install new power 0.4 hr 96 steering pump brace only (vehicles without A/C) V4222 Install new power 0.8 hr 96 steering pump brace and replace mounting bracket (vehicles without A/C) V4223 Install new power 0.5 hr 96 steering pump brace only (vehicles with A/C) V4224 Install new power 1.0 hr 96 steering pump brace and replace mounfing bracket (vehicles with A/C)

*Add 0.1 hour for administrative time allowance.

CAMPAIGN IDENTIFICATION LABEL

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 ball point 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.

ADMINISTRATIVE PROCEDURE

Procedures covering this campaign are outlined in Section V of your dealership's "GMC Truck Claims Processing Manual" #P 8719.

Dear GMC Truck Owner:

This notice has been sent to inform you that GMC Truck Division, in the interest of customer satisfaction, is conducting a recall campaign that includes your vehicle.

REASON FOR THE RECALL

WHAT WE WILL DO

WHAT YOU SHOULD DO

Please contact your dealer to arrange a service date. Instructions for performing this service have been sent to your GMC Truck dealer. The labor time necessary to perform the inspection and/or correction may vary from ten (10) minutes to one (1) hour, depending on the amount of service required for your vehicle. Please ask your dealer if you wish to know how much additional time will be needed to process your vehicle.

The enclosed owner 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 owner 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.

GMC TRUCK DIVISION GENERAL MOTORS CORPORATION

Object Number: 80486 Size: FS

Object Number: 80485 Size: FS

Object Number: 79261 Size: FS

Object Number: 95211 Size: SH

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.