I just got a 3rd row seat from a salvage yard along with the seat belt
harnesses that hang from the roof. My truck never had a 3rd row seat,
but the 2nd row had flip-up things for it and I noted that the roof
had plates over where the seat belts would hang from. My assumption
was that under the carpet was mounting points for the seat, but I was
wrong.

The salvage yard had removed everything for me before I got there (!)
and so I really didn't look at the truck it came from. I looked at
mine and while there is absolutely nothing where the rear of the seat
would hook in, there are caps around where the front of the seat would
hook in, and under those caps are body-to-frame mounts.

I'm thinking now that to do this the right way, I'd have to replace
some or all of the bed of the suburban and weld in one that was setup
for a 3rd row seat. It's also possible that there's just a frame
mounted on the floor that the seat hooks into. Does anyone have a 3rd
row on an early 90's suburban and know how it hooks in? I'm not sure
if it's another part I can get from the junk yard or if I'll have to
custom fabricate a frame to mount it to. Had I removed the parts from
the truck myself, I'd of noticed how it was hooked in, but no such
luck.

Thanks,
--Jeff