I had to salvage my TB and forgot the two extra wheels I had in the garage.
They are 245/75 R16 6 bolt pattern
I know they fit trailblazers, envoys, and Rainiers, but I'm not sure what other GMs.
One has okay tread, the other, not so much.
I may have pictures later when I have time to get them out, but they're just the normal wheels from them.