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Q: Oil Pressure Gauge registers high. on 2004 GMC Yukon

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Oil pressure gauge is registering almost 80. Is this something to be concerned about? Oil was changed about 1 month ago and gauge just started registering high.
(1) Answer
Very likely the oil pressure gauge sending unit is failing. Best theing to do is install a mechanical test gauge and see if the pressure's too high or not. If the oil pressure's really at 80 lbs, it's too much and could damage the engine bearings. If it's too high, the oil pressure relief valve system may be malfunctioning and needs to be fixed. More likely, the gauge sending unit is failing.
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