Parking brake: drivelineRecall 91V-032 · Chevrolet and GMC vehicles
GENERAL MOTORS CORP. recall 91V-032 covers 14,044 Chevrolet and GMC vehicles for a parking brake: driveline problem, reported to NHTSA on February 19, 1991.
Source: NHTSA recall 91V032000 and manufacturer quarterly reports. Started by an NHTSA defect investigation.
The problem
THE PARKING BRAKE DRUM ATTACHMENT BOLTS MAY LOOSEN AND CAUSE A DRIVELINE LOCKUP CONDITION WHEN THE BUS IS STOPPED OR ALMOST STOPPED.
The risk
DRIVELINE LOCK-UP COULD CAUSE LOSS OF VEHICLE CONTROLWITHOUT PRIOR NOTICE, AND RESULT IN A VEHICLE CRASH.
The fix
REMOVE ALL OF THE PARKING BRAKE DRUM BOLTS, APPLY A RETAINING COMPOUND TO NEW BOLTS, AND TORQUE THE NEW BOLTS TO SPECIFICATION.
SYSTEM: TRANSMISSION MOUNTED PARKING BRAKES DRUM.VEHICLE DESCRIPTION: SCHOOL BUSES EQUIPPED WITH HYDRAULIC BRAKES (JE3) ANDALLISON AT545 AUTOMATIC TRANSMISSIONS (MF1).
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
The investigation behind this recall
- PARK BRAKE DRUM LOOSENHTSA