It's been several years, but from memory...
I didn't realize it at the time I bought it, but it was a factory manual transmission truck that someone had swapped a small block C6 into. Badly.
Vibrations. Coming from everywhere. I never found the sources of most of them, but it was unpleasant enough that for all practical purposes my ex wife wanted nothing do do with the truck.
Rust. Lots of it. Most covered by the fender flares I eventually bought for it, but still visible in spots.
Wandering steering. It needed a thorough overhaul of every bushing front to back.
Also, if I remember correctly, it was a dual tank truck that only worked properly through one tank.
Pretty sure there was a lot more to it, but that's what springs to mind years later.