1980 GM C-4 Engine Performance Diagnosis Manual

Original product service training manual.

This manual contains performance diagnosis procedures and charts for the early 1980 C-4 engines.

Charts included are for:

• Early 3.8L Buick built engines (National)

• Early 2.5L Pontiac built engine in X car (Cal.)

• Early 2.8L Chevrolet built engine in X car (Cal.)