SMU-SECT. 6E-ENG. CONT REV. DIAG TROUBLE CODE. GMC Truck Jimmy

SUBJECT: SERVICE MANUAL UPDATE - SECTION 6E - ENGINE CONTROLS REVISED DIAGNOSTIC TROUBLE CODE (DTC) P1406

MODELS: 1996-97 CHEVROLET AND GMC C/K, GMT600, M/L, P3, S/T AND BRAVADA MODELS WITH 4.3L, 5.0L, 5.7L, 7.4L ENGINE (VINS W, X, M, R, J - RPOS L35, L30, L31, L29)

THIS SERVICE BULLETIN IS BEING ISSUED TO INFORM TECHNICIANS OF A REVISION TO DIAGNOSTIC TROUBLE CODE (DTC) P1406. WHEN DIAGNOSING THIS DTC, THE TECHNICIAN IS INSTRUCTED TO USE THIS UPDATED DTC P1406 TABLE.

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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.