EXCESSIVE ENLARGEMENT OF THE WHEEL CYLINDER PILOT HOLE IN THE REAR BRAKE BACKING PLATE COULD ALLOW THE WHEEL CYLINDER TO ROTATE AND CAUSE LOSS OF BRAKE FLUID. CONSEQUENCE OF DEFECT: A LOSS OF BRAKE FLUID LEADS TO LOSS OF REAR BRAKE ACTION, CREATING THE POTENTIAL FOR AN ACCIDENT. FRONT BRAKES WOULD REMAIN OPERATIONAL.
Consequence & remedy
Consequence: Not supplied
Remedy: ADD A PART TO PREVENT WHEEL CYLINDER FROM ROTATING.
REAR AXLE ASSEMBLY MAY HAVE AXLES THAT WERE IMPROPERLY MANUFACTURED. THIS CONDITION MAY RESULT IN SEPARATION OF THE AXLE SHAFT AND WHEEL ASSEMBLY FROM THE VEHICLE.
Consequence & remedy
Consequence: Not supplied
Remedy: THE DEALER WILL INSPECT THE REAR AXLE TO DETERMINE WHETHER IT WAS MANUFACTURED AT THE BUFFALO PLANT. IF SO, THEY WILL MAKE AXLE MEASUREMENTS AND IF NECESSARY REPLACE OR MODIFY AFFECTED AXLE COMPONENTS WITHOUT CHARGE.
THE BOLTS THAT ATTACH THE LOWER REAR CONTROL ARM TO THE FRAME MAY FRACTURE. THE REAR CONTROL ARM SUPPORTS AND POSITIONS THE REAR AXLE. FRACTURE OF THE BOLTS WOULD ALLOW THE CONTROL ARM TO DROP FREE.
Consequence & remedy
Consequence: Not supplied
Remedy: BOTH REAR CONTROL ARM ATTACHMENT BOLTS WILL BE REPLACED WITHOUT CHARGE.
UNDER CERTAIN DRIVING CONDITIONS, THESE VEHICLES CAN EXPERIENCE TEMPERATURES IN THE FRONT WHEEL OUTER BEARING AREA WHICH CAN AFFECT THE WHEEL BEARING GREASE. THIS CAN RESULT IN INADEQUATE LUBRICATION OF THE BEARING. THIS CONDITION MAY BE FURTHER AGGRAVATED BY IMPROPER ADJUSTMENT OF THE FRONT WHEEL SPINDLE NUT.
Consequence & remedy
Consequence: Not supplied
Remedy: THE DEALER WILL INSTALL NEW FRONT WHEEL OUTER BEARINGS PACKED WITH GREASE AND THE SPINDLE WILL BE COATED WITH LUBRICANT. NEW GREASE RETAINER CAPS WILL ALSO BE INSTALLED TO MAINTAIN GREASE IN OUTER BEARING. THIS WILL BE DONE FREE OF CHARGE.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
1
EA86006 · Brake Backing Plate
Opened Nov 27, 1985 · Closed Nov 28, 1988
Status: closed (inferred from source dates) · Service Brakes, Hydraulic
SUMMARY:GM IS CONDUCTING A VOLUNTARY RECALL CAMPAIGN (85V-048)INVOLVING 2,136,826 VEHICLES. THE RECALL IS LIMITED TO VEHICLES BUILT ATCERTAIN ASSEMBLY PLANTS WHICH, ACCORDING TO GM, OVERTORQUED THE BRAKEPIPE NUT,THEREBY OVERSTRESSING THE WHEEL CYLINDER SUPPORT AREA OF THEBACKING PLATE.ANALYSIS:FRONT BRAKES PROVIDE SUFFICIENT BRAKING FOR PASSENGER CARSIN MOST NON-EMERGENCY SITUATIONS. ALL AFFECTED TRUCKS ARE INCLUDED INTHE CURRENT RECALL.IN MOST CASES THE PROBLEM IS DISCOVERED DURING BRAKEMAINTENANCE.THE RECALL APPEARS TO COVER THOSE GROUPS OF CARS WITH THEHIGHEST FAILURE RATES.STATUS:ANALYZING GM IR RESPONSE AND NEW COMPLAINT DATA. DRAFT CLOSINGREPORT BY 5/15/88.===
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