SHORT OPERATION OF MALFUNCTION INDICATOR LAMP (MIL). Pontiac Grand Prix 1993

********************************************************************* CONDITION: EARLY 1993 W-CAR VEHICLES EQUIPPED WITH 3.LL GEN II (LH0) SPECIAL ENGINES (CALIFORNIA EMISSION--NB2) AND 4T60E AUTOMATIC TRANSAXLES (M13) MAY HAVE A VERY SHORT ILLUMINATION CYCLE FOR THE BULB CHECK FUNCTION WITH THE MALFUNCTION INDICATOR LAMP (MIL). OPERATION OF THE MIL DURING START-UP MAY DIFFER FROM OTHER GM MODELS AND YEARS. ALL OTHER OPERATIONS OF THE MIL ARE NOT AFFECTED AND ARE CONSISTENT WITH OTHER MODELS AND YEARS.

CAUSE:

THE MIL BULB CHECK FUNCTION WAS NOT FULLY USED IN EARLY BUILT GEN II SPECIAL VEHICLES.

CORRECTION:

UPON CUSTOMER CONCERN, THE OPERATION OF THE MIL BULB CHECK CAN BE CHANGED FOR CONSISTENCY WITH OTHER GM VEHICLES BY INSTALLING PRODUCTION CALIBRATION PART NUMBER 16190541, EE (FLASH) PROM BROADCAST CODE "BFCR." CORPORATE SERVICE BULLETIN 316513 UPDATES THE SERVICE MANUAL TO REFLECT THE MIL OPERATION CHANGE.

PART INFORMATION:

EE (FLASH) PROM PART NUMBER BROADCAST CODE ----------- --------------- 16190541 BFCR

THIS EE (FLASH) PROM IS AVAILABLE ON STG CD RELEASED FEBRUARY 1993 VERSION 31.014.

WARRANTY INFORMATION:

LABOR OPERATION: T0500 LABOR TIME: 0.3 HOUR

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.