What oil are you running?
How many miles on the truck?
Does engine make any noises?
Does oil pressure come up when driving? If it does, what pressure is showing at say 45 mph?
Biggest oil pressure issue with these is the oil pickup O ring into the pump, or, a bad pump....
There is also a oil gallery plug that has O ring hardening alowing the oil pressure to bypass back to the sump....
Hope this helps
