S15/T15 4WD Jimmy V6-262 4.3L VIN Z (1992)
Technical Service Bulletin # 93C04B
Date: 930701
Campaign - Remote Engine Oil Filter Adapter Replacement
GMC NUMBER: 93-C-04 (B)
GROUP: 6A Engine Mechanical
DATE: July 1993
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 1992-93 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 VIN breakpoints shown.
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, Parts and Warranty Information
1. For L35 CPI Engines, remove two (2) wingnuts from remote air cleaner box and move air cleaner box aside.
