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ODB II light lit. Oil Gauge at 0. Then pegs at 80 then back to 0.

Vehicle: 2009 GMC Sierra 5.3

1 Answer

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by (11.5k points)

Hi there,

This code indicates an issue with the oil pressure sensor. Here is some info for you.

P0523 GMC - Engine Oil Pressure Sensor Circuit High Voltage

Read more: https://www.autocodes.com/p0523_gmc.html

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