CAMPAIGN: REMOTE ENGINE OIL FILTER ADAPTER. GMC Truck Jimmy

SUBJECT: REMOTE ENGINE OIL FILTER ADAPTER

MODELS: 1992 4-WHEEL DRIVE JIMMY UTILITY VEHICLES AND T15 PICKUP TRUCKS WITH 4.3L ENGINES

General Motors has determined that CERTAIN 1992 4-Wheel Drive Jimmy Utility Vehicles and T15 Pickup Trucks with 4.3L engines (RPO's LB4 or L35, VIN Code Z or W may have remote engine oil filter adapters that were machined incorrectly. The condition is internal to the adapter and will not give any outward indication of a problem. However, an improperly machined adapter could result in the engine oil not properly flowing through the oil filter and/or cooler (if equipped).

To correct this condition, the remote engine oil filter adapter will be replaced. Involved vehicles will also receive a new oil filter and oil change.

VEHICLES INVOLVED

Involved are CERTAIN 1992 4-Wheel Drive Jimmy Utility Vehicles and T15 Pickup Trucks with 4.3L engines (RPO's LB4 or L35, VIN Code Z or W) built within the following VIN breakpoints:

Year Plant Plant From Through ---- ----- Code ---- ------- ------ 1992 Shreveport "8" 1GTDT14Z2 1GDCT14Z4 N8500001 N8800002 Pontiac "O" 1GKCT18Z3 1GDCT18Z7 West N0500002 N0810631 Moraine "2" 1GKDT13Z1 11GKDT13ZX N2500001 N2509408

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. Dealers should confirm vehicle eligibility through VISS (Vehicle Information Service System) 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. For L35 CPI Engines, remove two (2) wingnuts from remote air cleaner box and move air cleaner box aside.

2. Disconnect engine oil lines from adapter. Save 0-rings for possible re-use at re-assembly.

3. If vehicle is equipped with an engine oil cooler, disconnect oil cooler lines from adapter. Save 0-rings for possible re-use at re-assembly.

4. Remove oil filter adapter from body with oil filter still attached.

5. Install new remote oil filter adapter assembly to body with new oil filter still installed to adapter as provided in kit.

6. Inspect both sets of 0-rings for cuts and other imperfections, and replace 0-rings as required.

7. If vehicle is equipped with an engine oil cooler, reconnect oil cooler lines using o-rings.

8. Reconnect engine oil lines using 0-rings.

9. Drain engine oil from crankcase.

10. Fill crankcase with new engine oil (approximately 4-1/2 quarts).

11. Run engine and inspect connections for leaks.

12. Install "Campaign Identification Label."

PARTS INFORMATION

Parts 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). 25% of the anticipated required parts will be preshipped to dealers on or about February 19, 1993. Both part number assemblies will be included in the shipment, if applicable. The parts will be charged to the dealer's open parts account.

Part Number Description VIN List Code Qty. ----------- ------------ -------------- ------ 10236273 Oil Filter Assembly With A 1 Adapter (Vehicles not equipped with oil cooler) (Standard on LB4 - VIN Z)

10236274 Oil Filter Assembly With B 1 Adapter (Vehicles equipped with oil cooler) (Standard on L35 - VIN W and Optional on LB4 - VIN Z)

12345610 Engine Oil 4.5 Qts.

15564870 0-Rings 0-4 as Required.

The campaign printout sent to dealers with involved vehicles indicates which vehicles require P/N 10236273 ("A") and which vehicles require P/N 10236274 ("B"). After receiving the "preship" parts, order the balance of required parts accordingly.

WARRANTY INFORMATION

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

Labor *Time Trouble Operation Description Allowance Code Number ----------- --------- -------- --------- V7770 Replace Oil Filter, 0.4 Hrs. 96 Remote Adapter & Change Engine Oil (Vehicles Without Oil Cooler) V7771 Replace Oil Filter, 0.5 Hrs. 96 Remote Adapter & Change Engine Oil (Vehicles With Oil Cooler)

* For dealer to receive Administrative Time Allowance associated with this campaign, add 0.1 hour to the Labor Operation 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 campaign number and five (5) digit dealer code of the dealer per forming 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 "GM Truck Claims Processing Manual" #P9119.

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.