Its fairly simple. there 3 bolts that hold the TB cover on and i believe 4 bolts on the intake elbow. Its easy to drop the bolts down under the intake manifold so be careful!
Use some carb cleaner to loosen the carbon and a screwdriver may be needed to loosen the carbon in the egr passages. inspect the EGR valve for carbon build up, if any claen it with the carb cleaner. Once you get it cleaned up put it back together and diconnect the neg battery cable for a couple of min to erase the codes and reset the computer. Start the truck and let it run at idle for 15 min to relaern air/fuel and idle speed etc. Let it get up to operating temp and take it for a test drive in city and hwy driving for 20-30 min. Drive it kind of aggressively to see if you get CEL. If the CEL doesnt come back your problem should be fixed!
Check back when finished!