1977 GMC G30 Recalls (2)

Campaign:

77V111000 on 10/11/1979

Component:

Service brakes, hydraulic:foundation components:master cylinder

Affected:

12,963

Defect:

On the involved vehicles, the brake master cylinder may have been assembled with reservoir mounting bolts that were improperly processed. this could make these bolts brittle and subject to breaking. if breakage occurs, a brake fluid leak may develop between the reservoir and master cylinder. loss of brake fluid would adversely affect vehicle braking capability.

Correction:

Dealer will replace the master cylinder reservoir mounting bolts with an improved type, without charge to owner.

Notes:

Vehicle description: vans and motorhomes equipped with hydro-boost assistsystems.system: service brakes; hydraulic master cylinder.consequences of defect: partial loss of braking capability could occur,resulting in loss of vehicle control and an accident.

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Campaign:

76V198000 on 10/11/1979

Component:

Service brakes, hydraulic:foundation components:hoses, lines/piping, and fittings

Affected:

28,436

Notes:

General motor campaign no 77c03.chevrolet no.77c05 gmc.vans.possibilitythat the right front brake line assembly may have been mispositioned so thatrubbing contact occurs with the steering relay rod during left turns.if thisoccurs, it could result in failure of the brake line causing a loss of brakefluid and consequent loss of the front braking action.the rear brake systemwill remain functional.(correct by inspecting and reposit- ioning brake lineto provide required clearances).

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