SMU - SECTION 6E - ENGINE CONTROLS - REVISED. GMC Truck GMC C Pickup

REVISION: 02/03/98

THIS BULLETIN IS BEING REVISED TO ADD THE M/L AND S/T MODELS AND ALSO INCLUDE PAGE NUMBERS IN THE 1996 AND 1997 SERVICE MANUALS. PLEASE DISCARD CORPORATE BULLETIN NUMBER 61-65-60 (SECTION 6E - ENGINE FUEL AND EMISSION). ______________________________________________________________________

SUBJECT: SERVICE MANUAL UPDATE-SECTION 6E-ENGINE CONTROLS- REVISED DIAGNOSTIC TROUBLE CODE (DTC) P1345

MODELS: 1996-97 CHEVROLET AND GMC S/T, M/L, C/K, G, P3 MODELS 1996-97 OLDSMOBILE BRAVADA WITH 4.3L, 5.0L, 5.7L AND 7.4L ENGINE (VINS W, M, R, J - RPOS L35, L30, L31, L29)

THIS BULLETIN REVISES THE DIAGNOSTIC TROUBLE CODE (DTC) P1345. WHEN DIAGNOSING THIS DTC, THE TECHNICIAN IS INSTRUCTED TO USE THIS REVISED DTC P1345 TABLE AND SUPPORTING TEXT.

ONE DIAGNOSTIC IS TO BE USED FOR THE 4.3L V-6 ENGINES. ONE DIAGNOSTIC IS TO BE USED FOR THE 5.0L, 5.7L AND 7.4L V-8 ENGINE. CAMSHAFT RETARD OFFSET ADJUSTMENT PROCEDURE FOR THE V-8 ENGINE ONLY. THE SERVICE MANUALS AND THE APPROPRIATE PAGE NUMBERS ARE LISTED AS FOLLOWS:

**1996** * PAGES 6E-270 AND 271 - G VAN 4.3L * PAGES 6E-735 AND 736 - G VAN 5.0L, 5.7L, 7.4L * PAGES 6E-269 AND 270 - C/K TRUCK 4.3L * PAGES 6E-748 AND 749 - C/K TRUCK 5.0L, 5.7L, 7.4L * PAGES 6E-261 AND 262 - M/L VAN 4.3L * PAGES 3B-268 AND 269 - P3 TRUCK 4.3L, 5.7L, 7.4L * PAGES 6E-638 AND 639 - S/T TRUCK 4.3L

**1997** * PAGES 6E-271 AND 272 - G VAN 4.3L * PAGES 6E-735 AND 736 - G VAN 5.0L. 5.7L, 7.4L * PAGES 6E-295 AND 296 - C/K TRUCK 4.3L * PAGES 6E-799 AND 800 - C/K TRUCK 5.0L, 5.7L, 7.4L * PAGES 6E-278 AND 279 - M/L VAN 4.3L * PAGES 3B-288 AND 289 - P3 TRUCK 4.3L, 5.7L, 7.4L * PAGES 6-1094 AND 1095 - S/T TRUCK 4.3L

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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.