I was driving home I looked at the gauge and I see 0 oil pressure. I pulled over immideatly. I shut off the truck check the oil its completely full. Restarted the truck it sounded fine. Oil pressure was back up. I drove it back to my house because I was a couple blocks away. It was seeing 60 at about 2000 rpm and when I Let it go back to idle it was barely above the red line. I shut it off and restarted once again it went back up to just below 30. I think it is the cluster but don't want to find out the hard way. Isn't there an alarm that would go off if the oil pressure dropped to zero and a message on the DIC?