There's a tiny little bracket under there that holds the line by the oil pan bolts that uses an 8 or 10mm screw (can't remember which). Pull that off. Then move the lines just enough (they move a little with that bracket off) to get a socket on the bolts for the oil pan. Be careful with it - you will have to move the pan around a good bit to get it out and jack the front of the truck up a good bit to get it to clear the pickup tube when removing it. Move the lines as little as possible to get it out. It will come out with patience.
i got all the bolts out and am about to jack the truck - my hands were so dirty - i cant put it back together without cleaning it...