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Home >> GMC >> 1978 >> Forward Control 5.7L Eng VIN L, Automatic Trans, Trans Mfr CD 475/M40 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Switches, Gauges & Instrument Panels >> Testing >> Oil Pressure & Temperature Gauge

Oil Pressure & Temperature Gauge

Both gauges show actual readings and require a minimum of maintenance. The oil pressure gauge uses a direct tube from engine to gauge and if it becomes restricted, remove tube at both ends and blow out the line. The temperature gauge is electric and uses a sending unit to transmit engine temperature. Do not repair either unit, replace units when required.