SMU - SECTION 3 - DRIVEABILITY & EMISSIONS

SUBJECT: SERVICE MANUAL UPDATE-SECTION 3-DRIVEABILITY AND EMISSIONS CONTROL MODULE SYSTEMS-REVISED INCORRECT OR FALSE DTC 91-98 CYLINDER BALANCE FAULT

MODELS: 1994-95 CHEVROLET AND GMC TRUCKS, C/K, G, P3 MODELS WITH 6.5L DIESEL ENGINE (VINS S, F, P-RPOS L56, L49, L65

DTCS 91-98 CYLINDER BALANCE FAULT ARE INTENDED TO IDENTIFY A SPECIFIC CYLINDER. PROM MODIFICATIONS IN 1994 AND 1995 FOR CYLINDER BALANCE DTCS MAY CAUSE A CYLINDER IDENTIFIED IN THE SERVICE MANUAL TO BE INCORRECT. A NEW DIAGNOSTIC PROCEDURE USING THE SCAN TOOL IS ATTACHED TO PROPERLY IDENTIFY THE CORRECT CYLINDER BY PERFORMING CYLINDER CUTOUT (SCAN TOOL NAME: "INJ. BALANCE").

THIS INFORMATION REPLACES ALL INFORMATION FOUND IN SECTION 3 UNDER DTCS 91-98 CYLINDER BALANCE FAULT.

THE FOLLOWING PAGES ARE BEING REVISED: 1994 DRIVEABILITY, EMISSIONS + ELECTRICAL DIAGNOSIS C/K TRUCK: PAGES 3-119 AND 3-120 G TRUCK AND P3 CHASSIS: PAGES 3-113 AND 3-114

1995 DRIVEABILITY, EMISSIONS + ELECTRICAL C/K TRUCK: PAGES 3-119, 3-120 AND 3-121 G TRUCK: PAGES 3-113, 3-114 AND 3-115 P3 CHASSIS: PAGES 3-113 AND 3-115

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 1995 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.