I will have to check on a few things, the truck is currently 2 hours away.
Not sure if 6 or 8 lug. With the way it is parked I was unable to see the badge with the 3xxx identification which would help narrow down true 3/4 ton or heavy 1/2 ton. It is a long bed and has enough room between the cab and fender for a side mounted spare without the need for a notch in the fender. White painted grill, not chrome. Don't know if either of those help with identification.
I have no interest in dealing with split rims, there is no need to convince me of the benefits of replacing them. I'm pretty sure they are one piece though, the split rims I have seen have a pretty distinctive rim and these don't have that. Also the tires have gone flat, and there is no indication of the rims being loose, which I would expect to see if split rim.
Thanks for the link to the manuals, as you mentioned info on the GMC trucks is far less available than the Chevys. Luckily there is a large degree of overlap.
I know of Coker tire are there others vendors I should be looking at for tires.
