Removing the oil pan is simpler than
described in item 20 of this page in a Shop Manual (you really do not have to turn the engine over, on a stand or, especially, under the truck). The gasket might cause the pan to stick to the block, but light taps on the side of the p[an usually cause it to drop off.
The oil pump does not usually get in the way, if you are able to drop the pan straight down enough to clear the pump - move the pan to the front or to the rear (just look around below the pan and strategize in which direction you want to remove it).
Oh yes, be sure to empty the oil from the pan before removing the pan.
