For 1990-2009 cars

# ANTI-LOCK BRAKE SYSTEM (ABS) INDICATOR REMAINS 'ON'

#### SUBJECT: ANTI-LOCK BRAKE SYSTEM (ABS) INDICATOR REMAINS "ON", DIAGNOSTIC TROUBLE CODES (DTC'S) 21 AND 22 ARE SET (REPLACE WHEEL SPEED SENSOR HARNESS CONNECTOR)

#### MODELS: 1995 BUICK SKYLARK 1995 OLDSMOBILE ACHIEVA 1995 PONTIAC GRAND AM

#### VIN BREAKPOINTS:

MODEL FROM TO ===== ==== ==

SKYLARK C406400 C412300 ACHIEVA M309800 M316940 GRAND AM C723200 C742000 M520300 M535300

#### CONDITION:

SOME OWNERS MAY COMMENT THAT THE ANTI-LOCK BRAKE SYSTEM (ABS) INDICATOR REMAINS "ON".

#### CAUSE:

THE ABS INDICATOR MAY REMAIN ON DUE TO A BROKEN WIRE IN THE FRONT WHEEL SPEED SENSOR CONNECTOR AT THE BACK OF THE TERMINAL CRIMP.

#### CORRECTION:

#### IMPORTANT: SUSPECT VEHICLES WERE BUILT IN OCTOBER, 1994 AND HAVE TAPE ON LEADS TO BACK OF FRONT WHEEL SPEED SENSOR HARNESS CONNECTORS. IF A FAILURE OCCURS, THEN CHANGE BOTH FRONT WHEEL SPEED SENSOR HARNESS CONNECTORS.

1. IF THE ABS INDICATOR IS "ON" AND ABS DIAGNOSTIC TROUBLE CODES (DTC'S) 21 AND/OR 22 ARE PRESENT, CHECK BOTH FRONT WHEEL SPEED SENSOR HARNESS CONNECTORS FOR A BROKEN WIRE.

2. IF THE WIRE IS BROKEN, INSTALL WHEEL SPEED SENSOR HARNESS CONNECTOR KIT(S), P/N 12140077 (LEFT FRONT WHEEL) AND/OR P/N 12140078 (RIGHT FRONT WHEEL).

3. THE KIT INCLUDES INSTRUCTIONS, SPLICES AND "PIGTAIL" CONNECTOR.

4. THE JUMPER IS LONG ENOUGH TO INSURE THE PROPER SPLICE LOCATION (WITHIN THE MAIN BRANCH OF THE ENGINE HARNESS AND NOT WITHIN THE CONTROL ARM SECTION OF THE WIRING HARNESS) AND NOT AT FLEX ZONES.

5. KIT USAGE WILL ALLEVIATE REPEAT FAILURES.

PARTS ARE EXPECTED TO BE AVAILABLE ON JUNE 26, 1995.

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION NUMBER: N6035 USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 0 ATTACHMENTS: 0

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 1995 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.