FLUTTER TYPE NOISE FROM HVAC SYSTEM. Buick Park Avenue 1997

THIS IS A MONTHLY SERVICE NEWSLETTER ARTICLE. THIS BULLETIN IS NOT INTENDED FOR PUBLICATION.

SUBJECT: FLUTTER TYPE NOISE FROM HVAC SYSTEM (FOREIGN MATERIAL AT AIR MIX DOOR)

MODELS: 1997-98 BUICK PARK AVENUE/ULTRA

CONDITION:

A FLUTTER TYPE NOISE CAN BE HEARD FROM THE HVAC SYSTEM. THIS NOISE MAY OCCUR IN ANY MODE AND ANY FAN SPEED, AND IN SOME CASES MAY CHANGE WITH DIFFERENT MODES AND FAN SPEEDS.

CAUSE:

FOREIGN MATERIAL AT EITHER AIR MIX DOOR. THERE IS A PIECE OF MYLAR THAT IS GLUED TO THE BACK OF EACH AIR MIX DOOR. IN SOME CASES, THERE MAY BE AN ADDITIONAL PIECE OF MYLAR PRESENT, HELD IN PLACE BY STATIC ELECTRICITY.

CORRECTION:

REMOVE THE ADDITIONAL MYLAR FROM THE VEHICLE.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY USE: LABOR OPERATION NUMBER - D1811 USE CURRENT PUBLISHED LABOR 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.