2002 Chevy Silverado oil pressure gauge

Asked by Apr 16, 2016 at 12:55 PM about the Chevrolet C/K 1500

Question type: Maintenance & Repair

I have a 2002 Chevy Silverado 5.3 v6 rear
wheel drive.  The low oil pressure goauge
light is coming on when the engine temp
gets to 200 degrees. When first started it is
reading 40 as normal.  I have changed the
oil pressure switch and have checked the
oil it reads perfect.  Please help

4 Answers

107,305

Did you clean the screen below the oil pressure sender? After that install a manual oil pressure gauge in line, that was you can see what the actual pressure is, and if it drops like the electric one then you either have worn bearings that are letting too much pressure by or the oil pump is starting to fail.

Thanks for reply about to replace the gauge. Now the filter is the it behind the oil pressure switch or is it below the oil pressure switch?

107,305

It is underneath the oil pressure sender unit, it's about 1.5 inches tall, I would recommend replacing it if you get back there. But most people just clean it.

77,745

They did not start putting in that screen until 2007. Some of the 5.3L engines do have a oil pressure issue, which ends up being the oil pump itself. I believe it is in the front of the engine, and is a gear driven oil pump. As tennisshoes suggests, check the oil pressure with a mechanical gauge to verify oil pressure. May be just the Oil Pressure Sending Unit itself.

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