For 1990-2009 cars

# SMU SEC. 8C & 6E3 REVISED POWERTRAIN CONTROL MODULE

#### SUBJECT: SERVICE MANUAL UPDATE - SECTION 8C AND 6E3 - REVISED POWERTRAIN CONTROL MODULE (PCM) REMOVAL AND REPLACEMENT PROCEDURE

#### MODELS: 1994 BUICK PARK AVENUE AND LESABRE 1994 OLDSMOBILE NINETY EIGHT AND EIGHTY EIGHT 1994 PONTIAC BONNEVILLE

THE POWERTRAIN CONTROL MODULE (PCM) CONNECTOR PINS COULD BE BENT IF THE CONNECTORS AND PCM ARE NOT MATED CAREFULLY BEFORE INSTALLING PCM INTO PCM BRACKET. UPDATE THE PCM SERVICE PROCEDURE IN SECTION 8C AND 6E3 AND IN THE BUICK ELECTRICAL SYSTEMS MANUAL (ESM) TO REFLECT THE FOLLOWING PROCEDURE.

POWERTRAIN CONTROL MODULE - =========================

REMOVE OR DISCONNECT:

1. NEGATIVE BATTERY CABLE.

2. DISABLE SIR SYSTEM, REFER TO "DISABLING THE SUPPLEMENTAL INFLATABLE RESTRAINT (SIR) SYSTEM" IN SECTION 9J OR 8C.

3. PCM FROM MOUNTING BRACKET. PULL BOTTOM OF PCM REARWARD OVER LOCKING TABS AND DOWNWARD TO REMOVE.

4. PCM CONNECTORS.

5. IF PCM IS BEING REPLACED, REMOVE PROM FOR INSTALLATION IN NEW PCM.

INSTALL OR CONNECT:

1. IF PCM IS BEING REPLACED, INSTALL PROM FROM ORIGINAL PCM.

2. CAREFULLY INSTALL PCM CONNECTORS TO PCM BEFORE INSTALLING PCM INTO BRACKET.

3. PCM INTO BRACKET. MAKE SURE PCM IS UP OVER LOCKING TABS AND LOCKS INTO PLACE.

4. ENABLE SIR SYSTEM, REFER TO "ENABLING THE SUPPLEMENTAL INFLATABLE RESTRAINT (SIR) SYSTEM" IN SECTION 9J OR 8C.

5. NEGATIVE BATTERY CABLE.

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.

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