[bouncytruck]

So, are you still having the problem after pulling the fuses? If so, you've ruled all those items out (unless you've got more than one short). Can you tell if there is a draw on the battery while the truck parked? What shape are your wire harnesses? If they've been hacked by PO's (multiple stereos, extra lights, gadgets under the hood, two setups, etc), it might be safest to replace them.