SMU-UPDATE-SECTION 8A-100-ELECTRICAL

SUBJECT: SERVICE MANUAL UPDATE - SECTION 8A-100 - ELECTRICAL DIAGNOSIS - REVISED SCHEMATICS (HEADLAMPS)

MODELS: 1997 BUICK LESABRE - BUILT AFTER VIN BREAKPOINT 480000

THIS BULLETIN IS BEING ISSUED TO REVISE THE SCHEMATICS ON PAGES 8A-100-6 AND 8A-100-7 IN THE BUICK H-CAR SERVICE MANUAL. THESE REVISED SCHEMATICS UPDATE THE GROUND WIRING TO THE TWILIGHT SENTINEL DELAY CONTROL IN THE LAMP DIMMER SWITCH SO THAT IT IS NOW GROUNDED THROUGH THE LAMP CONTROL MODULE (LCM).

THE ATTACHED TWO SCHEMATICS APPLY TO VEHICLES BUILT AFTER VIN 480000.

FIGURES: 00 ATTACHMENTS: 02

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.