SMU - SECTION 6E3, 9, 9C, 9A - DRIVEABILITY & EMISSIONS. Chevrolet Blazer

SUBJECT: SERVICE MANUAL UPDATE-SECTION 6E3, 9, 9C, 9A-DRIVEABILITY AND EMISSIONS-REVISED LINEAR EGR INSTALLATION PROCEDURE

MODELS: 1992-95 CHEVROLET AND GMC TRUCK M/L VANS 1992-95 CHEVROLET AND GMC TRUCK S/T MODELS 1993-95 CHEVROLET AND GMC TRUCK C/K MODELS 1994-95 CHEVROLET AND GMC TRUCK G VAN 1994-95 CHEVROLET AND GMC TRUCK P3, P/G CHASSIS 1992-93 OLDSMOBILE BRAVADA WITH 4.3L AND 7.4L ENGINES (VINS W, N - RPOS L35, L19) AND (VIN Z - RPO LB4 -- WITH CALIFORNIA EMISSIONS)

THIS SERVICE BULLETIN REVISES THE LINEAR EGR INSTALLATION PROCEDURE, IN THE FOLLOWING SERVICE MANUALS:

1992-93 OLDSMOBILE BRAVADA SERVICE MANUAL, PAGE 6E3-C7-6. 1992-93 LIGHT DUTY TRUCK, FUEL AND EMISSIONS SERVICE MANUAL, PAGES 9-19 AND 9C-6. 1994-95 S/T DRIVEABILITY EMISSIONS AND ELECTRICAL DIAGNOSIS SERVICE MANUAL AND THE 1994 S/T TRUCK SUPPLEMENT WITH RPO CTF, PAGE 9A-8. 1994-95 C/K, M/L, G VAN AND P/G AND P3 CHASSIS DRIVEABILITY EMISSIONS AND ELECTRICAL DIAGNOSIS SERVICE MANUALS, PAGE 9A-6.

THE REVISED PROCEDURE IS AS FOLLOWS:

INSTALL OR CONNECT 1. EGR VALVE AND NEW GASKET. 2. VALVE TO FLANGE BOLTS. TIGHTEN BOLTS IN TWO STEPS. A. THE FIRST STEP TO 10 N.M (89 LB IN). B. THE SECOND STEP TO 25 N.M (18 LB FT). 3. ELECTRICAL CONNECTOR.

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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.