CAMPAIGN: ENGINE OIL COOLER OMITTED DURING PRODUCTION
MODELS: 1982 C25 AND C,K35 SERIES TRUCKS EQUIPPED WITH RPO LL4 (6.2L DIESEL ENGINE) AND RPO HC4 (4.56 RATIO HEAVY DUTY REAR AXLE)
General Motors has determined that some early production GMC C-25 and C,K35 light duty trucks equipped with RPO LL4 (6.2 liter diesel engines) and RPO HC4 (4.56 ratio heavy duty rear axles) were assembled with the engine oil coolers omitted. The engine oil cooler is standard equipment on light trucks with this engine-axle combination. Absence of the engine oil cooler could decrease useful engine life.
VEHICLES INVOLVED
Involved are some 1982 GMC C25 and C,K35 Trucks equipped with RPO LL4 (6.2L Diesel Engine) and RPO HC4 (4.56 ratio Heavy Duty Rear Axle) within the following vehicle parameters:
Plant From Through
Janesville CJ500348 CJ507786
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 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 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 the vehicle.
On vehicles involved in this campaign that have been recently sold to a retail owner, where no owner's name and address were available to GMC Truck & Coach 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 & Coach Division of General Motors Corporation 101 Union Street Plymouth, Michigan 48170
OWNER NOTIFICATION
Owners will be notified of this campaign on their vehicles by GMC Truck & Coach 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 grille and front bumper.
2. Drill three (3) .199" +/- .004" diameter holes in radiator support (Refer to Figure No. 1).
3. Attach bracket P/N 14027387 to radiator support using three (3) sheet metal screws P/N 11502453.
4. Assemble two (2) brackets P/N 14026211 to radiator support using two (2) bolts PIN 473892. Do not tighten screws at this time.
5. Install cooler assembly P/N 3028541 to brackets using four (4) bolts P/N 9419000 and four (4) nuts P/N 3866846.
6. Tighten all screws and bolts to specified torque, as shown in the illustrations.
7. Disconnect engine oil cooler hose lines from cooler pipes near radiator (Refer to Figure No. 2).
8. Connect the inlet hose that was just disconnected to the outlet pipe (Refer to Figure No. 3).
9. Assemble the auxiliary cooler pipes P/N's 14045667 and 14045668 to the auxiliary cooler and the inlet pipe and the outlet line using three (3) elbow fittings P/N 337941.
10. Tighten all connections to the specified torque. Use caution that threads are not cross--threaded.
11. Assemble clip assembly P/N 14036788 with bolt PIN 9433256.
12. Add approximately 3/4 pint of engine oil to engine.
13. Start engine. Idle engine for five (5) minutes. Check all connections for oil leaks. Increase and decrease engine speed a few times to increase oil pressure. Check for leaks.
14. Replace grille and bumper.
15. Install "Campaign Identification Label" according to the instructions contained in this bulletin.
PARTS INFORMATION
Parts required to complete this campaign will be shipped to involved dealers by GMC Truck & Coach on a no charge basis. Any questions pertaining to parts shortage, etc. should be directed to your Zone Service Department.
Quantity Part Per Number Description Vehicle
3028541 Cooler Asm-Engine (1) Oil 14026211 Bracket-Eng Oil (2) Cooler Upper 14027387 Bracket-Eng Oil (2) Cooler Lower 9419000 Bolt-Eng Oil Cooler (4) 3866846 Nut-Eng Oil Cooler (4) 11502453 Sheet Metal Screw (3)
473892 Bolt-Eng Oil Cooler Bracket
337941 Fitting-Eng Oil (3) Cooler Hose 14045667 Pipe-Eng Oil (1) Cooler Inlet 14045668 Pipe-Eng Oil (1) Cooler Outlet 14036788 Clip-Eng Oil (1) Cooler Pipe 9433256 Bolt-Eng Oil Cooler (1) Pipe Clip NPN Engine Oil
Parts are not to be ordered from or returned to WDDGM.
WARRANTY INFORMATION
Dealers should submit an accurately filled out Warranty Repair Order on each vehicle completed under this campaign.
Labor *Time Operation Allow- Trouble Number Description ance Code
V1290 Install Engine 1.3 Hr. 96 Oil Cooler Assembly
*For dealer to receive Administration Time Allowance associated with this campaign, add 0.1 hour to the Labor Operation Time Allowance.
CAMPAIGN IDENTIFICATION LABEL
Each vehicle modified 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.
ADMINISTRATIVE PROCEDURE
Procedures covering this campaign are outlined in Section V of your dealership's "GMC Truck Claims Processing Manual" issued October, 1981.
Dear GMC Truck Owner:
General Motors has determined that some early production GMC C-25 and C,K-35 light duty trucks equipped with 6.2 liter diesel engines (RPO LL4) and 4:56 heavy duty rear axles (RPO HC4) were assembled with the engine oil coolers omitted. The engine oil cooler is standard equipment on light trucks with this engine-axle combination. Absence of the engine oil cooler could decrease useful engine life.
To correct this condition in your vehicle, your GMC Truck Dealer will install the omitted engine oil cooler. The service will be performed at no charge to you. The labor time to complete the installation will be approximately 1-1/2 hours.
Instructions have been sent to your dealer. Parts will be available on August 16, 1982. Please contact your dealer on or after this date to arrange a service date.
The enclosed Owner Reply Card identifies your vehicle. Presentation of this card to your dealer will assist them 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. We urge your prompt attention to this matter.
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.
