I started to pass another vehicle, when I pushed hard on the accelerator, the speed bogged down and wouldn't pick upe speed and the AC started blowing hot very soon after

 

Locate someone who can scan for codes and post those here.

 

When you floor the truck the AC will shut off so you have max power then when you let off the AC will come back on. However the other problem I cant help you with could be many things. Does the truck do it all the time or just once. It may be a one time thing. if it does it all the time than get it to a dealer and they can fix it. If it only has done this once than no big deal. if you have tuned your truck the dealer won't even look at it and you are on your own for the cost of repairs.