1990 GMC B6 Recalls (2)

Campaign:
91V032000 on 02/27/1991
Component:
Parking brake:driveline
Manufactured:
07/31/1985 - 10/31/1989
Affected:
14,044
Defect:
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.
Correction:
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).

Campaign:
92V187000 on 12/29/1992
Component:
Vehicle speed control
Affected:
6,656
Defect:
A manufacturing condition in the throttle body injector (tbi) unit might occur to allow the throttle cam lever to disengage from the throttle drive shaft.
Consequence:
If the throttle cam lever disengages from the throttledrive shaft, the engine could go to wide open throttle without prior warning.this loss of vehicle accelerator control could result in a vehicle crash.
Correction:
Replace the throttle drive cover assembly.
Notes:
System: fuel system; throttle linkage.vehicle description: school buses with 6.0 liter engines.

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