EXPERTEC TSB (57-65-03)

Publication date: 1995-03-02
Reference number: 57-65-03

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): 57-65-03, Date of Issue: 03/02/95

LIGHT SURGE AT - HIGHWAY SPEEDS

Model(s): 1994 CHEVROLET AND GMC TRUCK S/T MODELS

1994 OLDSMOBILE BRAVADA WITH 4.3L V6 ENGINE (VIN W -RPO L35) AND AUTOMATIC TRANSMISSION

Bulletin No.: Chevrolet 57-65-03

Oldsmobile 57-65-03

GMC 57-65-03

Date: 03/02/1995

CONDITION

SOME OWNERS MAY COMMENT ON A LIGHT HIGHWAY SURGE CONDITION (MINOR ENGINE RPM INSTABILITY). THIS CONDITION MAY OCCUR AT HIGHWAY SPEEDS WITH LIGHT THROTTLE.

CAUSE

CALIBRATION PARAMETERS NOT OPTIMIZED FOR THIS OPERATING CONDITION.

CORRECTION

IF STANDARD DIAGNOSTIC PROCEDURES FOR THE ABOVE CONDITIONS DO NOT RESOLVE THE PROBLEM, THE FOLLOWING CALIBRATIONS (FOR THIS SPECIFIC LISTED CONCERN) MAY RESOLVE THE PROBLEM.

Fig 1: CALIBRATIONS TABLE

NOTE: PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR CODE: J6364

LABOR TIME: USE PUBLISHED LABOR TIME.

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.