[dsraven]

when the truck is cold, sitting on a level surface, pull the rad cap and check he level of the fluid. top up the rad and the overflow tank as required. next time you run the truck rev it up to about 2-2500 rpm for a minute, with a few quick shots up to the 3000 rpm range, allowing it to come down to idle after thoise blips, so the water pump can flow the coolant through everything well. sometimes idle is not enough flow for the pump to overcome the high spots in the system. warm it up and let it sit over night again to cool off well. recheck the level of the rad and overflow again when it's cold. I remember you saying there is no heater so you are probably good since there is no other places to keep air trapped except in the engine. sounds like you got it this time.