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Home >> GMC >> 1996 >> C3500 HD 6.5 F, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - 6.5L Diesel >> Testing >> Oil Pressure Gauge >> Gauge Always Indicates Low Oil Pressure

Gauge Always Indicates Low Oil Pressure

  1. Disconnect oil pressure switch/sender connector. Turn ignition on. If gauge indicates high pressure, replace oil pressure switch/sender.
  2. If gauge indicates no or low pressure, locate and repair short circuit in Tan wire between oil pressure switch/sender connector and instrument cluster connector. If wire is okay, replace oil pressure gauge.