SMU-SECT. 6E- ENG CONT. REV PCM MESSAGE & DTC P1653

SUBJECT: SERVICE MANUAL UPDATE - SECTION 6E - ENGINE CONTROLS REVISED PCM MESSAGE AND DTC P1653 DIAGNOSIS

MODELS: 1996-98 OLDSMOBILE AURORA WITH 4.0L ENGINE (VIN C - RPO L47)

THIS BULLETIN IS BEING ISSUED TO REVISE THE 1996 THRU 1998 ENGINE CONTROL SECTION WITH THE FOLLOWING INFORMATION:

* DTC P1653 A/C COMPRESSOR CLUTCH CONTROL CIRCUIT

ADD TO THE 1997 ENGINE CONTROLS SECTION THE FOLLOWING DIAGNOSTIC INFORMATION:

* PCM MESSAGE DIAGNOSIS - LOW ENGINE OIL LEVEL MESSAGE

THIS DIAGNOSTIC INFORMATION WAS NOT INCLUDED IN THE SERVICE MANUAL.

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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.

COPYRIGHT 1997 GENERAL MOTORS CORPORATION ALL RIGHTS RESERVED.