I'm back.
Ok, the radiator was taken care of. Now I'm going to start working on the suspension and steering. The parts will be a combination of Moog for the upper and lower control arms and Rare Parts for some heavy duty tie rods. Afterwards, I'll replace the dry rotted BFG All-Terrain tires. I read this article
https://expeditionportal.com/an-overland-chevy-avalanche/#disqus_thread and it gave me some ideas on how to make the Avalanche reliable for long-distance travel.
I'm looking into the best way of having electrical power in the back to run a refrigerator.
I think that this will make a great truck for overland travel.