I have a 2008 6.0 Silverado with 200,000 miles. I bought it 2 years ago, one owner, and I've had 0 problems. Within the past year I've put 3 oil sending units in it. Usually, as soon as I turn on the key the oil pressure gauge moves barely. When I start it, it never builds oil pressure. I put 3 sending units in and it kept fixing the problem until now. Now I have no oil pressure whatsoever and I can't tell if motor is making noise because I have an exhaust leak. (Look, I know I have other things to fix). Please help. I can't drive my truck when the gauge shows 0. I have not tried a manual gauge yet, I'm trying to find one. Any help is appreciated.

 

try posting in the Silverado section with a more descriptive title like "2008 oil sender keeps failing".

 

Definitely try a mechanical gauge and find out if you do actually have oil pressure..