CAMPAIGN: REAR BRAKE DRAG WRONG SPRINGS

THE PARKING BRAKE CABLES INSTALLED ON THESE VEHICLES HAVE INCORRECT RETURN SPRINGS. WHEN ADJUSTED TO SPECIFICATIONS, THE INCORRECT SPRING CAN CAUSE REAR BRAKE DRAG. REAR BRAKE DRAG CAN RESULT IN PREMATURE LINING WEAR, OVERHEATING OF THE BRAKE DRUMS, GRABBING OR UNEVEN BRAKE ACTION AND POOR FUEL ECONOMY. WHEN ADJUSTED TO ELIMINATE REAR BRAKE DRAG, THE PARKING BRAKE WILL NOT MEET THE GRADE-HOLDING REQUIREMENTS OF FMVSS 105-75. DEALER ACTION TO PREVENT THE POSSIBILITY OF THIS CONDITION FROM OCCURRING, DEALERS ARE TO INSTALL NEW REAR PARKING BRAKE CABLES ON VEHICLES INVOLVED. VEHICLES INVOLVED FROM TO PLANT PARTS INFORMATION THE FOLLOWING TWO (2) REAR PARKING BRAKE CABLES ARE TO BE OBTAINED FROM WDDGM FOR EACH VEHICLE INVOLVED: RIGHT REAR CABLE - 25516526 LEFT REAR CABLE - 25516527 TO ENSURE THESE PARTS WILL BE OBTAINED AS SOON AS POSSIBLE, THEY SHOULD BE ORDERED FROM GM PART (WDDGM) ON A C.I.O. ORDER WITH NO SPECIAL INSTRUCTION CODE, BUT ORDER ON AN ADVISE CODE (2). TECHNICAL PROCEDURE 1. HOIST AND SUPPORT VEHICLE. REPLACE BOTH REAR PARKING BRAKE CABLES. REFER TO THE 1983 CHASSIS SERVICE MANUAL. ADJUST PARKING BRAKE AS FOLLOWS: A. DEPRESS PARKING BRAKE PEDAL EXACTLY THREE RATCHET CLICKS. B. CHECK TO MAKE SURE EQUALIZER NUT GROOVE IS WELL LUBRICATED WITH GREASE. C. TIGHTEN ADJUSTING NUT UNTIL THE RIGHT REAR WHEEL CAN JUST BE TURNED REARWARD USING TWO HANDS BUT IS LOCKED WHEN FORWARD ROTATION IS ATTEMPTED. 3. REMOVE SUPPORT, LOWER VEHICLE, AND INSTALL A CAMPAIGN IDENTIFICATION LABEL.

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.