SMU - SECTION 3 - DRIVEABILITY & EMISSIONS

SUBJECT: SERVICE MANUAL UPDATE-SECTION 3-DRIVEABILITY AND EMISSIONS CONTROL MODULE SYSTEMS-REVISED DTC 34 FLOW CHART

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

DTC 34 DIAGNOSTIC CHART WAS UPDATED TO BETTER DIAGNOSIS TIMING ERRORS DUE TO A "SKEWED" CRANKSHAFT POSITION SENSOR.

THIS INFORMATION REPLACES THE INFORMATION FOUND IN SECTION 3, UNDER DTC 34, DIAGNOSTIC FLOW CHART.

FIGURES: 00 ATTACHMENTS: 01

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.