Pakesi Pakesi

While driving, and when I am not pushing the gas the truck will sometimes just drop off and die (Sometimes its hard to tell that it actually died). I have to put it in neutral and turn the key while the truck is still rolling to keep it going. It does not idle rough and does not feel like something is wrong. There are no codes that come up and no check engine light. I changed all my plugs and wires thinking that was the issue since it was long over due...no luck. The idle seems to be at the right level (around 700 - 800 rpms). I just ordered a new Idle air control valve and a throttle position sensor. I'm looking for some suggestions here.. 2007 Silverado 1500 classic 4.3L, V6