SMU - SECTION 6E - ENGINE CONTROLS - REVISED. Chevrolet Export Express 1997

For 1990-2009 cars

# SMU - SECTION 6E - ENGINE CONTROLS - REVISED

#### SUBJECT: SERVICE MANUAL UPDATE-SECTION 6E-ENGINE CONTROLS- REVISED INJECTOR BALANCE TEST PROCEDURE

#### MODELS: 1996-97 CHEVROLET AND GMC TRUCK S/T, M/L, C/K, G, P MODELS 1996-97 OLDSMOBILE BRAVADA WITH 4.3L, 5.0L, 5.7, 7.4L ENGINE (VINS W, X, M, R, J - RPOS L35, LF6, L30, L31, L29)

THIS BULLETIN IS BEING ISSUED TO INFORM TECHNICIANS OF A REVISION TO THE INJECTOR BALANCE TEST. THIS REVISED PROCEDURE WILL HELP THE TECHNICIAN TO USE THE INJECTOR BALANCE TEST WITH GREATER CLARITY AND ACCURACY. PLEASE USE THIS REVISED PROCEDURE OF THE INJECTOR BALANCE TEST FOR THE FOLLOWING MODEL YEARS:

1996-97 S/T TRUCK V-6 1996-97 M/L VAN V-6 1996-97 G VAN, V-6 AND V-8 1996-97 C/K TRUCK, V-6 AND V-8 1996-97 P TRUCK, V-6 AND V-8

TECHNICIANS DIAGNOSING VEHICLES WITH MISFIRE DTCS (P0300-P0308) MUST PERFORM THE INJECTOR COIL TEST AND THE INJECTOR BALANCE TEST PRIOR TO INJECTOR REPLACEMENT.

FIGURES: 00 ATTACHMENTS: 04

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 1996 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.