NHTSA Campaign Id 77V200000; Date: Nov. 16, 1977
1978 Buick Lesabre; 1978 Cadillac Deville; 1978 Cadillac Limousine; 1978 Chevrolet Caprice; 1978 Chevrolet Impala; 1978 Oldsmobile 88; 1978 Pontiac Bonneville; 1978 Pontiac Bonneville Brougham; 1978 Pontiac Catalina
Component: Wheels:lugs/nuts/bolts
Manufactured by: General Motors Corp.
Affected Units:: 4,504
The rear wheel mounting bolts on the affected vehicles, are brittle and therefore may fracture. This brittleness is due to improper heat treatment during manufacture. If the bolts break, the tire and wheel assembly may separate from the vehicle.
Dealer will inspect and, if necessary, will replace defective bolts on all axles and the ten rear axle wheel mounting bolts, free of charge.
Vehicle description: passenger vehicles. System: suspension; rear wheel mounting bolts. Consequences of defect: if separation occurs under vehicle operation, loss ofvehicle control without prior warning and an accident could result.
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