TAPE DECK NOISE (REPOSITION CROSS VEHICLE WIRING HARNESS). GMC Truck GMC K Pickup

********************************************************************** * REVISION 12/20/93 * * * * THIS BULLETIN IS BEING REVISED TO CORRECT THE LABOR OPERATION * * NUMBER. PREVIOUS DIVISIONAL PUBLICATION NUMBERS WERE: * * * * DIV BULLETIN # PUBLISH DATE * * * * CHEVROLET 93-249-9 08/02/93 * * GMC TRUCK 93-8A-92 07/06/93 * * GM CANADA 93-10-225 09/27/93 * **********************************************************************

SUBJECT: TAPE DECK NOISE/STATIC DURING PROGRAM PAUSES BETWEEN SONGS (REPOSITION CROSS VEHICLE WIRING HARNESS AWAY FROM TAPE DECK)

MODELS: 1988-93 CHEVROLET AND GMC C/K 1,2,3 TRUCKS WITH RPO UM6 OR UX1 RADIO WITH REMOTE CASSETTE PLAYER

CONDITION:

SOME OWNERS MAY COMMENT ON NOISE/STATIC HEARD THROUGH THE AUDIO SYSTEM DURING PROGRAM PAUSES WHEN USING THE CASSETTE PLAYER.

CAUSE:

ELECTROMAGNETIC INTERFERENCE EMITTED FROM THE CROSS VEHICLE WIRING HARNESS AND RECEIVED BY THE MAGNETICALLY SENSITIVE PICK UP HEADS IN THE CASSETTE PLAYER.

CORRECTION:

THE CROSS VEHICLE WIRING HARNESS IS SEVERAL INCHES LONGER THAN NECESSARY TO ACCOMMODATE SERVICING REQUIREMENTS. IN SOME INSTANCES, THE SLACK ALLOWS THE HARNESS TO BUNCH UP INSIDE THE CROSS VEHICLE CONDUIT/GUIDE COMING VERY CLOSE TO THE BOTTOM OF THE TAPE PLAYER DIRECTLY ABOVE THE HARNESS (FIGURE 1).

THIS CONDITION CAN BE CORRECTED BY REMOVING THE GLOVE BOX LINER FOR ACCESS AND PULLING THE HARNESS TAUT OR OTHERWISE AS FAR AWAY FROM THE TAPE PLAYER AS POSSIBLE.

THIS MAY NOT ELIMINATE THE NOISE 100 PERCENT IN EVERY CASE, BUT IT SHOULD (IN EVERY CASE) REDUCE THE NOISE LEVEL SIGNIFICANTLY.

WARRANTY INFORMATION FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION DESCRIPTION LABOR TIME

C2160 BOX, COMPARTMENT SEE APPLICABLE INSTRUMENT PANEL LABOR TIME GUIDE REMOVE AND REINSTALL

FIGURES: 01

Object Number: 83120 Size: FS

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.