I have my dad's 1992 Chevrolet Silverado 2500 (3/4 ton). It's a regular cab with 8' bed, 2WD, and 5.7 (350) TBI V-8 with automatic. It has about 230,000 miles. I inherited it after he passed away in 2010. He bought it used and it supposedly had been a North Carolina truck (that is, not from further north).
Chevrolets this vintage have real issues with rocker panels and cab corners rusting, and this truck is no exception. In some other states it wouldn't pass inspection. The fenders front and rear are also rotting above the wheelwells. I see some frame rust and wonder what shape the bed is in under the plastic aftermarket bedliner. Again, this supposedly had not been a northern truck from the salt belt...
The engine has a serious rear main seal leak and also a transmission leak, so fluids require constant topping. Dad had the same problems with both when he drove it. I did a tune-up about 5 years ago with new plugs, wires, distributor cap, and rotor, but recently it began running rough.
Rust took out the rear brake line, which I had a mechanic familiar with these trucks replace. I also replaced the tailpipes, radiator, and alternator soon after inheriting it.
The truck has had several nuisance electrical problems, most of which just happen to drain the battery. I've replaced the "heavy-duty" emergency-flasher relay under the dash three times because it likes to overheat and fail. The air conditioning never worked while Dad had it, though he tinkered with it and tried to fix it. The blower only works in high speed, and I had to replace it recently.
To its credit, the Silverado starts and runs easily with a turn of the key. But it needs enough work and I'm concerned enough about the rust issue that it's going to be retired to a salvage yard soon. My fear is that I get in it one day and my foot will go through the floor.
I prefer my Ranger any day.
My point is that these old Chevys do have serious weak spots, and you should be aware of them. The cab rust is common even on much newer Silverados here. Be warned.