There are a several fellow Bolters in the KC metro area that have AD trucks like yourself. Not to mention a bunch of folks that belong to the Genuine Chevy/GMC Truck Club of KC that also own and work on their AD trucks. I'm a Bolter and a Truck Club member.
If you aren't in a big rush to get to this, we could try to get together to see what might be figured out to resolve your problems. Send me a PM or an email (look at my profile for that) and we can discuss further.
In the mean time, please post some pics of your front fenders, radiator support and hood fit as they could prove useful in identifying what may be going on. Folks can take a look and possible see whats going on and offer helpful hints and tips.
