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Home >> GMC >> 1993 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Testing >> Coolant Temperature Gauge >> Gauge Indicates Hot When Engine Is Cold

Gauge Indicates Hot When Engine Is Cold

  1. Turn ignition on. Unplug connector from temperature gauge sending unit. If gauge indicates COLD, replace sending unit.
  2. If temperature gauge continues to indicate HOT, check for short to ground in wiring between sending unit and gauge. If circuit is okay, replace cluster.
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