Time for another update. Unfortunately it makes me look ignorant but I wanted to post it up in case it helps someone else down the road.

My initial problem was that the engine would start then...

Thanks. And to anyone that wants the stock 2003 Avalanche .bin in 9405 here it is.

Thanks for the replies. It occurred to me today at work that I may have jumped the gun posting this thread. I'll post a follow up when I know for sure but I think deleting the VATS may have been...

First off I want to start off informing anyone reading this I am a novice at tuning. I have very limited experience with EFI Live but I am trying to use the free tools right now.

To give the full...