VIBRATION/NOISE FROM ROOF LUGGAGE RACK. Chevrolet Blazer

SUBJECT: VIBRATION/NOISE FROM ROOF LUGGAGE RACK (SWITCH FRONT AND REAR CROSS BOWS WITH SLIDERS)

MODELS: 1996 CHEVROLET AND GMC S/T UTILITY MODELS

BUILT PRIOR TO VIN BREAKPOINTS:

MAKE PLANT VIN

CHEVROLET LINDEN TK187178 GMC LINDEN TK518234 CHEVROLET MORAINE T2231352 GMC MORAINE T2549352

CONDITION:

SOME OWNERS MAY REPORT A VIBRATION/NOISE FROM THE ROOF AREA AT HIGHWAY SPEEDS. THIS IS MOST NOTICEABLE WHEN VEHICLE SPEED PLUS WIND SPEED EQUALS 70 MPH OR MORE.

CAUSE:

THE FRONT ROOF RACK CROSS BOW IS VIBRATING AT THE SIDE RAIL.

CORRECTION:

SWITCH THE FRONT AND REAR CROSS BOWS WITH SLIDERS ATTACHED, FOLLOWING THE SERVICE PROCEDURE IN SECTION 9F OF THE 1996 S/T TRUCK SERVICE MANUAL. THIS PLACES THE THUMBWHEEL ATTACHMENTS FOR THE CROSS BOWS IN DIFFERENT LOCATIONS DIMINISHING THE VIBRATION/NOISE.

NOTICE: ONLY HAND TOOLS SHOULD BE USED DURING INSTALLATION. THE USE OF POWER TOOLS MAY RESULT IN THE CROSS-THREADING OF MOUNTING FASTENERS, NICKS AND SCRATCHES OF COMPONENT PARTS.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION DESCRIPTION LABOR TIME R2360 LUGGAGE RACK COMPONENTS USE PUBLISHED REPLACE LABOR OPERATION TIME

IMPORTANT: LABOR OPERATION IS CODED TO BASE VEHICLE COVERAGE IN THE WARRANTY SYSTEM.

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.