SMU - SECTION 3A - CONTROL MODULE SYSTEMS. Chevrolet Tahoe

SUBJECT: SERVICE MANUAL UPDATE-SECTION 3A CONTROL MODULE SYSTEMS (93 PCM AND 93 PCM 6)-REVISED CHART A1 NO MIL (SERVICE ENGINE SOON) TREE CHART

MODELS: 1995 CHEVROLET AND GMC TRUCK C/K, M/L, G, PG AND P3 MODELS WITH 4.3L, 5.0L, 5.7L AND 7.4L ENGINE (VINS W, Z, H, K, N - RPOS L35, LB4, L03, L05, L19)

THIS BULLETIN IS BEING ISSUED TO INFORM TECHNICIANS OF A REVISION TO CHART A-1 NO MIL (SERVICE ENGINE SOON) LOCATED IN THE FOLLOWING SERVICE MANUAL SECTION:

3-A, PAGE 3A-17 * 1995 C/K DRIVEABILITY, EMISSIONS AND ELECTRICAL DIAGNOSIS # GMT/95-PG-2 * 1995 M/L DRIVEABILITY, EMISSIONS AND ELECTRICAL DIAGNOSIS # GMT/95-ML-2 * 1995 G VAN DRIVEABILITY, EMISSIONS AND ELECTRICAL DIAGNOSIS # GMT/95-G-2

3-A, PAGE 3-A-15 * 1995 C/K REPRINT DRIVEABILITY, EMISSIONS AND ELECTRICAL DIAGNOSIS # GMT/95-C/K-2F * PG AND P3 DRIVEABILITY, EMISSIONS AND ELECTRICAL DIAGNOSIS # GMT/95-PG-2

ON THE C/K, M/L AND G VAN, BOX #2, THE FOURTH BULLET DOWN SHOULD READ: PROBE CIRCUITS 440 AND 439 WITH TEST LIGHT TO GROUND.

ON THE PG/P3, BOX #2, THE FOURTH BULLET DOWN SHOULD READ: PROBE BATTERY FEED AND IGNITION FEED CIRCUITS WITH TEST LIGHT TO GROUND.

FIGURES: 00 ATTACHMENTS: 00

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.