V-6 or 4 cylinder? The '86 V-6 is a GM product, and not highly thought of. You say no significant rust, can you see the floors? Floor coverings commonly hide rotted out floor pans.
But as said above, these are pretty simple trucks
I paid $1200 for my '87 4.0 inline 6, visible metal floor pans with no rust, cranking not running. I did have a little time to check it out, so I knew I had a fuel delivery issue.