TL;DR
- Silverado started in 1975 as the top trim on the C/K, not as its own model.
- The 1975-1987 square-body Silverado is the classic favorite; the 1988-1998 GMT400 is the OBS truck.
- The 350 small-block is the heart of these trucks; the 454 is the heavy hauler.
- Square-body interest is hot, so clean trucks and good trim now carry real money.
Buying a classic Chevrolet Silverado
For the classic era, Silverado was the loaded top trim of Chevrolet's C/K pickup, the one with the woodgrain dash, the gauges, and the brightwork. Both the square-body and the OBS trucks have become genuine collector and restomod favorites. Check current values on our classic car valuation page and browse other classic pickup trucks for sale.
Which Silverado to buy
The 1975-1987 square-body Silverado is the one most buyers want, with the boxy good looks and a deep parts supply. The 1988-1998 GMT400, the OBS or original body style truck, drives more like a modern vehicle and added the extended cab and later fuel injection. A clean square-body short-bed Fleetside is the blue-chip pick of the bunch.
| Generation | Years | Engines | Nickname |
|---|---|---|---|
| Square-body | 1975-1987 | 350 / 454 V8, 6.2 diesel | Square-body |
| GMT400 | 1988-1998 | 5.7 TBI, 454, 6.5 diesel | OBS |
What to inspect
These trucks are popular enough to flip, so check that the shine is more than skin deep. Rust and correct Silverado trim are the two value drivers.
🔧 Inspection Priorities
- Cab corners, rockers, and floor pans. The classic C/K rot zones; lift the carpet and check the seams.
- Bed sides, wheel arches, and rear cross sill. Common rust and haul damage; gauge the steel you will replace.
- Silverado trim completeness. The woodgrain, gauges, and brightwork define the trim and are getting hard to find.
- Frame and engine originality. Many have been re-engined or lifted; confirm what you are actually buying.
"Square-body fever is real, and the Silverado trim is the one everyone wants. Buy a solid, rust-free truck with its trim intact and you have bought the right one."
— Robert