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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis (Single Page) >> Electrical >> Gauges >> Instrument Panel - Except C/K Series Pickups >> Removal & Installation >> Coolant Temperature Gauge Test >> Gauge Reads Too Hot

Gauge Reads Too Hot

Disconnect temperature gauge sending unit lead connector. Turn ignition on. If gauge reads cold, replace temperature gauge sending unit. If gauge does not read cold, check for open circuit in Dark Green wire. If circuit is okay, see GAUGE INACCURATE under COOLANT TEMPERATURE GAUGE TEST.