I believe his problem is different. He says when he hits the gas, the
engine dies. Usually the car would run with the foot on the gas even
with a defective IAC valve.

Try to start the truck with the foot a little on the gas. If it does
start, but dies once you take your foot off the gas, then its probably
the IAC valve, which can be removed and cleaned or replaced easily.
If however you cannot start it check the basics first. Listen for the
fuel pump, check for spark, etc.