I need some input here. I have a 2010 Chevy Silverado LTZ. Recently had an issue where the oil pressure gauge would just bottom out and put the truck into limp mode. Took it to a shop they suggested the oil deactivation manifold. So we Changed the oil deactivations manifold (valley pan, oil deactivation solenoid- some refer to it as a different name) That didn't work. Change the oil sending unit (oil pressure sensor) along with the screen. That still didn't work. So we dropped the oil pan and changed the oil pick up tube and O ring. It seemed to run a little longer, but as soon as the truck got up to operating temp it would come across the dash "engine power reduced" and the oil pressure would drop to 0 and it puts it's self into limp mode. Any other suggestions on what would be causing this?
The local shop suggested maybe the gauge cluster is bad or a heat induced resistance sensor?? I haven't had it scanned yet so I'm not sure if it's throwing a code or if a code would even be given at this point.