I have a 2005 chevy silverado 1500 2wd 5.3. my oil pressure guage goes crazy nd bounces from 0 to 60 all the time, can this be the oil sending unit, if so where is it located
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check the filter,, if its bad enough your oil won't pass through it, making it look like your oil is full, but its not moving, Chevy's have whats known as a stepper motor also on the oil gauge,, whats bad about that is if thats gone bad, you have to replace the whole gauge cluster which last time I checked is 250.00
It could be the sending unit. If the truck is low on oil it will cause something similar. Be sure the oil level is topped up. The only way to be sure it so measure the actual oil pressure at the engine with a proper gauge..
the oil pressure sender unit tip is got sut build up remove it, clean or replace it. when oil is thin it gets right in but while its cold and thick it wont trigger the sending unit. causing light to come on.
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