INTERMITTENT OPERATION OF REMOTE KEYLESS ENTRY (REPLACE. Pontiac Trans Sport 1994

---------------------------------------------------------------------- REVISION 12/20/93

BULLETIN BEING REVISED TO CHANGE THE PCM P/N. ---------------------------------------------------------------------- REVISION 11/24/93

THIS BULLETIN IS BEING REVISED TO ADD VIN BREAKPOINTS AND REPLACEMENT PCM INFORMATION. ______________________________________________________________________

SUBJECT: INTERMITTENT OPERATION OF REMOTE KEYLESS ENTRY (REPLACE PCM)

MODELS: 1994 CHEVROLET LUMINA APV 1994 OLDSMOBILE SILHOUETTE 1994 PONTIAC TRANS SPORT WITH 3.8L ENGINE (RPO L27 - VIN CODE L)

CONDITION:

ON THE 1994 U-VAN WITH REMOTE KEYLESS ENTRY (RKE, RPO CODE AU0), AND 3.8L L27 (VIN CODE L) ENGINES, THE RKE MAY HAVE ONE OR MORE OF THE FOLLOWING CONDITIONS:

1. INTERMITTENT OPERATION WITH THE IGNITION "ON", OR FOR SIX SECONDS AFTER THE IGNITION IS SHUT "OFF".

2. MAY NOT BE ABLE TO "CUSTOMIZE" THE AUTOMATIC DOOR LOCKS (ADL) AS DIRECTED IN THE OWNER'S MANUAL. THE CUSTOMIZATION IS DONE USING THE RKE TRANSMITTER.

3. MAY NOT BE ABLE TO PROGRAM A NEW TRANSMITTER.

THIS CONDITION SHOULD OCCUR ON ONLY A SMALL PERCENTAGE OF VEHICLES AND THE SYSTEM WILL OPERATE NORMALLY WHEN THE IGNITION IS "OFF".

CAUSE:

THE PCM, NEW FOR 1994, PRODUCES MORE ELECTRICAL INTERFERENCE THAN PREVIOUS DESIGNS. THE RKE MODULE MAY PICK UP SOME OF THIS INTERFERENCE, AND MAY NOT OPERATE WHILE THE INTERFERENCE IS OCCURRING. THE PCM WILL STAY ON FOR SIX SECONDS AFTER THE IGNITION IS TURNED "OFF".

A NEW PCM WITH ADDED INTERNAL PROTECTION AGAINST INTERFERENCE WAS USED IN PRODUCTION AFTER THE FOLLOWING VIN BREAKPOINTS:

CHEVROLET: RT113893 PONTIAC: RT211289 OLDSMOBILE: RT306854

CORRECTION:

REPLACE THE PCM WITH P/N 16183247, FOLLOWING THE DIRECTIONS IN THE SERVICE MANUAL. WHEN REPLACING THE PCM FOR THIS CONDITION, ORDER A NEW PART FROM GMSPO. THIS PART HAS SEVERAL INTERNAL CHANGES, BUT USES THE SAME PART NUMBER. **DO NOT* USE A PART IN DEALER STOCK.

UNTIL THE NEW PART IS RECEIVED, ITEMS 2 AND 3 ABOVE CAN BE PERFORMED USING THE FOLLOWING PROCEDURE. THIS WILL NO LONGER BE NECESSARY AFTER REPLACING THE PCM.

1. TURN THE IGNITION "OFF" AND WAIT AT LEAST SIX SECONDS.

2. REMOVE THE "ECM" FUSE, TURN THE IGNITION BACK "ON". THEN DO THE PROGRAMMING AS SHOWN IN THE SERVICE MANUAL OR OWNER'S MANUAL. BOTH ITEMS ARE DONE WITH THE IGNITION "ON".

3. TURN THE IGNITION "OFF", THEN REINSTALL THE "ECM" FUSE.

PART AVAILABILITY:

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION:

LABOR OPERATION: J6360 TO REPLACE THE PCM USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 0

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.