When I start my truck for the firs time in the morning, it idles high and for the first few miles it seems to hesitate and not have any power. Kinda has a slight sputter. After those first 2-3 miles though it starts running perfect and has plenty of power and idle is normal. Its not cold outside when it happening. It has been in the mid 70'S here and still doing it. I have a feeling it has something to do with the "Aux Air Valve" on the throttle body, but I'm not sure. TPS is good. Any other ideas on what it could be?

 

maybe let her warm up?

 

The idle air control valve can go bad, remove it from your truck and take it apart and see if anything is visually wrong with it, its a very expensive part to buy if it is bad.