Vehicle recall 91V032000 · February 19, 1991
Chevrolet B6 and GMC B6
The parking brake drum attachment bolts may loosen and cause a driveline lockup condition when the bus is stopped or almost stopped.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- The parking brake drum attachment bolts may loosen and cause a driveline lockup condition when the bus is stopped or almost stopped.
- Consequence
- Driveline lock-up could cause loss of vehicle controlwithout prior notice, and result in a vehicle crash.
- Remedy
- Remove all of the parking brake drum bolts, apply a retaining compound to new bolts, and torque the new bolts to specification.
- Notes
- System: transmission mounted parking brakes drum.vehicle description: school buses equipped with hydraulic brakes (JE3) andallison AT545 automatic transmissions (MF1).
Recall details
- NHTSA campaign
- 91V032000
- Reported to NHTSA
- February 19, 1991
- Filed by
- GENERAL MOTORS CORP.
- Owner notification
- March 27, 1991
- Vehicles potentially affected
- 14,044
- Initiated by
- NHTSA’s Office of Defects Investigation
- Components
- Parking brake › Driveline
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
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