Oil Pressure Gauge Only Works In Park or Neutral

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LeFrostiPine

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Joined
Jun 4, 2022
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Kentucky
My 96 k1500 has been having a bit of an issue lately with the gauge. I am going to have it pressure tested next week, but the oil pressure gauge works properly in park or neutral. I get about 15 psi per 1000 rpm when hot, yet when put into gear, it'll only go up to 35-40psi max. Should I be concerned?
 
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