CAMPAIGN:EXCESS POLLUTANT EMISSIONS -'OPEN' ELEC.CURCUIT

GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1984 "F" SERIES MODELS EQUIPPED WITH RPO LC1 (2.8L V6) ENGINES WITHOUT AIR CONDITIONING MAY BE EMITTING POLLUTANTS IN EXCESS OF FEDERAL EMISSION STANDARDS. THE CAUSE HAS BEEN IDENTIFIED AS AN "OPEN" ELECTRICAL CIRCUIT BETWEEN THE E.C.M. (ELECTRONIC CONTROL MODULE) AND THE THROTTLE KICKER VACUUM SOLENOID WHICH MAY RESULT IN FAILURE TO MEET CO AND HC EMISSION STANDARDS. VEHICLES INVOLVED CERTAIN 1984 "F" SERIES MODELS EQUIPPED WITH RPO LC1 (2.8L V6) ENGINES WITHOUT AIR CONDITIONING WITHIN THE FOLLOWING VEHICLE PARAMETERS: PLANT FROM THROUGH VAN NUYS EL100322 EL105077 SERVICE PROCEDURE 1. OPEN HOOD. 2. EXPOSE THE FIVE (5) SEVERED WIRES IN THE ECM HARNESS, AT THE RIGHT HAND SIDE OF THE ENGINE COMPARTMENT. (SEE ILLUSTRATION). 3. STRIP THE INSULATION BACK 13MM FROM THE END OF THE TWO (2) TAN WIRES. TWIST THE BARE WIRES TOGETHER AND SOLDER TO ENSURE A PROPER CONNECTION. DO NOT UTILIZE "CRIMP" TYPE WIRE SPLICERS OR RELY ON A TWISTED CONNECTION WITHOUT SOLDER, AS THE SPLICE MAY BE EXPOSED TO ADVERSE ENVIRONMENTAL CONDITIONS RESULTING IN CORROSION AND THE LOSS OF ELECTRICAL CONTINUITY. 4. INSULATE THE SPLICE WITH ELECTRICAL TAPE. FOLD SPLICE BACK ALONG WITH THREE (3) ADJACENT SEVERED WIRES AND TAPE TO THE ECM HARNESS. 5. INSTALL CAMPAIGN IDENTIFICATION LABEL AND CLOSE HOOD.

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.