CAMPAIGN: LOOSE CAMSHAFT SPROCKET ATTACHING BOLTS
SUBJECT: LOOSE CAMSHAFT SPROCKET ATTACHING BOLTS
MODELS: 1996 JIMMYS WITH L35 ENGINE
General Motors has decided that CERTAIN 1996 Jimmys equipped with 4.3L engines (RPO L35, VIN Code "W") may have been built with the camshaft sprocket attaching bolts inadequately tightened. When the camshaft sprocket bolts are inadequately tightened, an engine failure is likely to occur.
To correct this condition, dealers will remove the engine front cover assembly and tighten the camshaft sprocket bolts. IMPORTANT: TO PREVENT DAMAGE TO THE VEHICLE ENGINE, DO NOT OPERATE ENGINE PRIOR TO COMPLETING THIS SERVICE PROCEDURE.
VEHICLES INVOLVED
Involved are CERTAIN 1996 Jimmys equipped with 4.3L engines (RPO L35). The involved VIN's are listed below:
Invoice Ship To Dealer Dealer VIN -------- --------- --- 48-10500 48-10500 1GKDT13W1T2513141 48-21005 48-21005 1GKDT13W6T2513104 48-21059 48-21059 1GKDT13W3T2513058 48-21750 48-21750 1GKDT13W0T2513132 48-26592 48-26592 1GKDT13W1T2513057 48-44599 48-45550 1GKDT13WXT2513056
The specific vehicles involved in this campaign have been identified by Vehicle Identification Number (VIN) Computer Listings. These listings are furnished to all involved dealers with the campaign bulletin. Dealers should confirm vehicle eligibility through VISS (Vehicle Information Service System) or SERVICENET prior to beginning campaign repairs.
DEALER CAMPAIGN RESPONSIBILITY
All unsold vehicles in dealers' possession and subject to this campaign MUST be held and inspected/repaired per the service procedure of this campaign bulletin BEFORE owners take possession of these vehicles.
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.
Owners of vehicles recently sold from your vehicle inventory are to be contacted by the dealer and arrangements made to make the required correction according to instructions contained in this bulletin.
In summary, whenever a vehicle subject to this campaign enters your vehicle inventory, or is in your dealership for service in the future, please take the steps necessary to be sure the campaign correction has been made before selling or releasing the vehicle.
If the name and address of the owner of an involved vehicle was unavailable to GMC Truck Division at the time of campaign initiation, the dealer must 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, Michigan 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. Remove engine front cover following the instructions in the 1996 Service Manual; Section 6.
2. Torque the camshaft sprocket bolts to 28 Nm (21 lb. ft.).
3. Install new engine front cover P/N 12554555 (do not reinstall removed front cover). Also use new water pump gaskets P/N 3754587.
4. Install Campaign Identification Label.
PARTS INFORMATION
A preshipment of parts in sufficient quantities to repair all assigned units will be sent to involved dealers on Monday, October 30, 1995. Preshipment parts will be charged to the dealer's open parts account. In the event a dealer has transferred or traded an involved unit, the parts should be forwarded to the appropriate dealer immediately.
Additional parts required to complete this campaign are to be obtained from General Motors Service Parts operation (GMSPO). To ensure parts are obtained as soon as possible, order them from GMSPO on a C.I.O. order with no special instruction code but order under an advise code (2). All Goodwrench parts system test dealers should order on a "VIP" order.
Part Number Description Quantity
12554555 Engine Front Cover Assembly 1 3754587 Water Pump Gasket 2
WARRANTY INFORMATION
Dealers should submit a warranty claim on each vehicle completed under this campaign.
Tot Labor Labor *Other Description CC Pts FC Op Hrs Hrs ----------- ------------------------------------ Tighten Camshaft Sprocket Bolts MA ** 96 V9795 2.3 0.1
* Campaign Administrative Allowance
** The "Parts Allowance" should be the sum total of the current GMSPO dealer net price plus 40% of all parts required for the repair.
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 campaign number and five (5) digit dealer code of the dealer performing the campaign service. This information must be inserted with a typewriter or ball point pen. This label is to be used in conjunction with the clear protective plastic cover provided with the Campaign Identification Labels.
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.
Additional Campaign Identification Labels and covers are available in sheets of 49 by calling VISPAC, Incorporated at 1-800-269-5100 (Monday through Friday 8:00 AM to 4:30 PM EST).
ADMINISTRATIVE PROCEDURE
Procedures covering this campaign are outlined in Section V of your dealership's "GMC Truck Warranty Claims Processing Manual" #P9119 Rev. 2/94.
Dear GMC Truck Customer:
As a valued customer, your complete satisfaction with your GMC truck is our goal. In keeping with this goal, we want to let you know that we have discovered a problem that could affect your vehicle and we want to take care of it at no charge to you.
On a number of 1996 Jimmys equipped with 4.3L engines (RPO L35), such as yours, may have been built with camshaft sprocket attaching bolts inadequately tightened. When the camshaft sprocket bolts are inadequately tightened, an engine failure is likely to occur.
To be absolutely sure that your vehicle is to specifications, we will remove the engine front cover assembly and tighten the camshaft sprocket bolts.
Instructions for performing this service have been sent to your GMC Truck dealer, and parts are available. Please contact your GMC Truck dealer to arrange a service date as soon as possible. This procedure will take about 2 hours and 20 minutes to complete, but you should ask how much additional time your dealer will need to schedule and process your vehicle.
The enclosed postage paid 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 furnish us the complete name and address of the person you sold or traded your vehicle to and return the card 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 product.
GMC TRUCK DIVISION General Motors Corporation
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.
