Gauges and warning lights

Tiny
EMMARIJO
  • MEMBER
  • 1995 GMC YUKON
  • V8
  • 4WD
  • AUTOMATIC
  • 215,000 MILES
Why is my oil pressure gauge dropping to zero every time the transmission switches gears?
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Wednesday, April 13th, 2011 AT 9:35 PM

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Tiny
DWB812
  • MEMBER
Check for a direct ground on the circuit. The gauge is "pegging" due to a direct ground rather than through the sensor.

Test the sensor on the driver's side front of the engine by the spark plug with a multimeter set to ohms. A very low ohms reading from the sensor connector pin to the engine block means replace the sensor.
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Thursday, April 14th, 2011 AT 1:16 AM

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