SMU - SEC. 6/6E - ENG CONTROLS REV. ENHANCED IGN.SYS. DIAG.. Chevrolet Brazil Blazer 1997

For 1990-2009 cars

# SMU - SEC. 6/6E - ENG CONTROLS REV. ENHANCED IGN.SYS. DIAG.

#### SUBJECT: SERVICE MANUAL UPDATE - SECTIONS 6/6E - ENGINE CONTROLS REVISED ENHANCED IGNITION SYSTEM DIAGNOSTIC PROCEDURE

#### MODELS: 1996-97 CHEVROLET AND GMC C/K, G, M/L, S/T MODELS 1996-97 OLDSMOBILE BRAVADA WITH 4.3L, 5.0L, 5.7L, OR 7.4L ENGINE (VINS W, X, M, R, J - RPOS L35, LF6, L30, L31, L29)

THIS BULLETIN IS BEING ISSUED TO REVISE THE ENHANCED IGNITION SYSTEM DIAGNOSTIC PROCEDURE IN SECTIONS 6 AND 6E OF THE FOLLOWING SERVICE MANUALS.

REPLACE THE ENHANCED IGNITION SYSTEM PROCEDURE WITH THE REVISED INFORMATION FOR THE FOLLOWING MODELS:

1996 C/K TRUCK BOOK 2, PAGES 6E-314 - 6E-317 PAGES 6E-797 - 6E-800 1997 C/K TRUCK BOOK 2, PAGES 6E-339 - 6E-342 PAGES 6E-850 - 6E-853

1996 SAVANA, EXPRESS/VAN BOOK 2, PAGES 6E-313 - 6E-315 PAGES 6E-782 - 6E-785

1997 G VAN BOOK 2, PAGES 6E-314 - 6E-316 PAGES 6E-780 - 6E-782

1996 S/T TRUCK BOOK 2, PAGES 6E-679 - 6E-681 1997 S/T TRUCK BOOK 2, PAGES 6-1137 - 6-1139

1996 M/L TRUCK BOOK 2, PAGES 6E-305 - 6E-307 1997 M/L TRUCK BOOK 2, PAGES 6E-321 - 6E-323

FIGURES: 00 ATTACHMENTS: 04

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 1998 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.