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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1551 (Instrument Panel System Displays & Gauges) >> Diagnostic Information and Procedures >> Water in Fuel Indicator Malfunction >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the water in fuel sensor.
  2. Connect a DMM between terminal A and terminal B of the sensor harness connector.
  3. Measure the resistance of the sensor while moving the float up and down the float barrel.
  4. The resistance should switch from less than 0.5 ohm and 0.L.
    • If the resistance did not change, replace the water in fuel sensor.
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