For 1990-2009 cars

# ENGINE OVERHEAT/COOLANT FAN INOPERATIVE

#### SUBJECT: ENGINE OVERHEAT/COOLANT FAN INOPERATIVE (REPLACE AND UP-SIZE CLG FAN MAXI FUSE)

#### MODELS: 1996 BUICK SKYLARK 1996 OLDSMOBILE ACHIEVA 1996 PONTIAC GRAND AM

#### CONDITION:

SOME OWNERS MAY COMMENT ON AN OVERHEATING ENGINE. IN 3.1L (VIN M - RPO L82) APPLICATIONS, THE PCM SHOULD SET DTC P1651 AND THE MIL MAY LIGHT.

#### CAUSE:

IN SOME OF THE ABOVE LISTED VEHICLES, THE CLG FAN MAXI FUSE (LT GRN, 30A), LOCATED IN THE UNDERHOOD FUSE CENTER, MAY OPEN CAUSING THE COOLANT FAN TO BECOME INOPERATIVE. THE COOLANT FAN MAY TEMPORARILY STALL DURING NORMAL OPERATION DUE TO A RESISTIVE FORCE AGAINST THE COOLANT FAN (EXAMPLE: A LARGE AMOUNT OF WATER HITTING THE FAN). THIS CAN CAUSE A POWER SURGE IN THE 542 CKT THAT MAY OPEN THE CLG FAN MAXI FUSE.

#### CORRECTION:

THE CLG FAN MAXI FUSE (LT GRN, 30A) SHOULD BE REPLACED WITH AN AMBER, 40A MAXI FUSE, P/N 12065933. THE FUSE BLOCK LABEL SHOULD ALSO BE REPLACED WITH AN UPDATED VERSION, P/N 12191458. ALL SERVICED VEHICLES MUST HAVE THIS NEW LABEL.

#### IMPORTANT: THIS CLG FAN FUSE VALUE AND FUSE BLOCK LABEL WILL CHANGE IN MID-MODEL YEAR PRODUCTION FROM LT GRN, 30A TO AMBER, 40A.

#### NOTICE: UNDER NO CIRCUMSTANCES SHOULD THE TECHNICIAN REPLACE THE CLG FAN FUSE WITH A FUSE VALUE LARGER THAN AMBER, 40A OR REPLACE ANY OTHER FUSE IN THE VEHICLE WITH ONE OF LARGER VALUE. WITH THE EXCEPTION OF THE CHANGE TO THE VALUE OF THE CLG FAN MAXI FUSE, FOLLOW THE ELECTRICAL REPAIR PROCEDURES COVERED IN SECTION 8A-5 OF THE SERVICE MANUAL.

#### PARTS INFORMATION:

PARTS ARE EXPECTED TO BE AVAILABLE ON DECEMBER 4, 1995.

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION NUMBER: N1720 USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 00 ATTACHMENTS: 00

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.