ACCESSORY DRIVE BELT NOISE (INSTALL NEW SERPENTINE BELT). Cadillac DeVille 1994

SUBJECT: ACCESSORY DRIVE BELT NOISE (INSTALL NEW SERPENTINE BELT)

MODELS: 1993 CADILLAC ALLANTE 1993-94 CADILLAC ELDORADO AND SEVILLE 1994 CADILLAC CONCOURS WITH 4.6L ENGINE (VINS 9, Y - RPOS LD8, L37)

1995 OLDSMOBILE AURORA WITH 4.0L ENGINE (VIN C - RPO L47)

CONDITION:

SOME OWNERS MAY EXPERIENCE ACCESSORY DRIVE BELT NOISE. THIS NOISE CONDITION IS MOST NOTICEABLE AT IDLE.

CAUSE:

ACCESSORY DRIVE BELT NOISE MAY BE CAUSED BY "PILLING" OF THE SERPENTINE BELT.

SERPENTINE BELT PILLING MAY RESULT FROM DEPOSITS ADHERING TO THE BELT AND/OR ACCESSORY DRIVE PULLEYS. THESE DEPOSITS DISTORT THE "V" SHAPED GEOMETRY OF THE BELT, CAUSING A CHIRP SOUND AS THE BELT SEATS INTO THE PULLEY GROOVES.

CORRECTION:

A NEW SERPENTINE BELT HAS BEEN DEVELOPED TO ADDRESS THIS CONDITION. INSPECT THE PART NUMBER ON THE BELT; IF IT READS 3542324, REMOVE THE BELT AS DESCRIBED IN SECTION 6B2 OF THE SERVICE INFORMATION MANUAL. BEFORE INSTALLING THE NEW SERPENTINE BELT, CLEAN THE GROOVES OF THE PULLEYS WITH A NYLON BRISTLE BRUSH TO REMOVE ANY SERPENTINE BELT DEPOSITS.

PART INFORMATION:

USE THE FOLLOWING PART NUMBERS WHEN ACCESSORY DRIVE BELT REPLACEMENT IS NECESSARY.

DESCRIPTION PART NUMBER APPLICATION ----------- ----------- ----------- ACCESSORY DRIVE BELT 12553287 4.6L LD8 AND L37 ENGINES 12553287 4.0L L47 ENGINE

PARTS ARE EXPECTED TO BE AVAILABLE FROM GMSPO JULY 11, 1994.

WARRANTY INFORMATION:

LABOR OPERATION NUMBER: J0667 USE PUBLISHED LABOR TIMES.

FIGURES: 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.