I have a 2002 2500HD Crew Cab 4X4 with a Duramax. Last week I noticed the oil presuure running lower than usual. After it warmed up it ran between 20-40. When I came to a stop light it would even drop to 18 or 19. I then noticed oil under the truck on Friday when I was leaving work. I came home and checked to see if I leaked oil the night before in my drive way and nothing. I then looked under the truck and noticed oil dripping from the frame like is was blowing out. It does not leak setting still just after the engine is running. The dealership can not look at until Monday. I am not running it in fear I could do more damage. I change oil regually with Shell Rotella T oil. It has 91K miles and will still be covered under the 100K mile duramax warranty. I was just wondering what this could be and if anyone else has had this problem? Any information would be greatly appreciated.