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Square Body Trucks for Sale

The square body generation, Chevrolet and GMC C/K pickups produced from 1973 to 1987, is the most collected classic truck era in America. Clean, geometric lines, body-on-frame toughness, and a massive aftermarket make these trucks as practical to own as they are to look at. Whether you want a dead-stock original, a restomod build, or a project, the selection below covers all of it. Browse current square body listings from private owners and dealers across the USA.

Popular models: Chevrolet C10, Chevrolet K10, GMC Sierra, Chevrolet C20, GMC Jimmy.

Chevrolet C10 (69) Chevrolet Silverado (51) GMC Sierra (39) Chevrolet Blazer (22) Chevrolet C/K Series (16) Chevrolet S10 (15) Chevrolet K10 (14) Chevrolet C20 (14) GMC C/K Series (12) Chevrolet K20 (9) GMC C10 (9) Chevrolet C30 (7)

303 listings found

1985 Chevrolet Silverado Dealer
United States

1985 Chevrolet Silverado

$17,495 110,000 miles
1973 GMC C10 Dealer
United States

1973 GMC C10

$7,795 30,000 miles
1985 GMC Jimmy Dealer
United States

1985 GMC Jimmy

$21,795 62,069 miles
1983 Chevrolet S10 Dealer
United States

1983 Chevrolet S10

$30,995 100 miles
1979 Chevrolet K10 Dealer
United States

1979 Chevrolet K10

$14,750
1978 Chevrolet C10 Dealer
United States

1978 Chevrolet C10

$33,495 27,900 miles
1975 Chevrolet Blazer Dealer
United States

1975 Chevrolet Blazer

$19,895
1978 Chevrolet Silverado Dealer
United States

1978 Chevrolet Silverado

$23,495 124,000 miles
1984 Chevrolet Silverado Dealer
United States

1984 Chevrolet Silverado

$12,995 175,000 miles
1978 Chevrolet K10 Dealer
United States

1978 Chevrolet K10

$40,995 67,000 miles
1984 GMC Sierra Dealer
United States

1984 GMC Sierra

$6,995
1976 Chevrolet C10 Dealer
United States

1976 Chevrolet C10

$21,495 92,456 miles
1973 Chevrolet C20 Dealer
United States

1973 Chevrolet C20

$6,495 50,000 miles
1979 Chevrolet Blazer Dealer
United States

1979 Chevrolet Blazer

$31,495 9,999 miles
1987 Chevrolet Silverado Dealer
United States

1987 Chevrolet Silverado

$7,495 120,000 miles
1987 GMC Sierra Dealer
United States

1987 GMC Sierra

$30,995 25,867 miles
1984 Chevrolet C10 Dealer
United States

1984 Chevrolet C10

$6,995 122,000 miles
1982 Chevrolet S10 Dealer
United States

1982 Chevrolet S10

$18,995 3,000 miles
1987 GMC Sierra Dealer
United States

1987 GMC Sierra

$35,995 40,000 miles
1985 Chevrolet Silverado Dealer
United States

1985 Chevrolet Silverado

$35,995 85,430 miles
1981 Chevrolet K10 Dealer
United States

1981 Chevrolet K10

$7,495 131,316 miles
1984 Chevrolet Blazer Dealer
United States

1984 Chevrolet Blazer

$15,995 75,000 miles
1987 GMC Sierra Dealer
United States

1987 GMC Sierra

$40,995 100 miles
1978 GMC Sierra Dealer
United States

1978 GMC Sierra

$9,995 39,000 miles

Why are square body trucks so popular?

Three reasons: abundance, parts availability, and aesthetics. GM sold millions of these trucks over fifteen years, so examples survive in every condition from barn-find originals to frame-off restorations. The aftermarket is massive, suspension, engine, interior, and exterior parts are manufactured new, not just pulled from donor trucks. And the styling, dismissed as dated for decades, has aged into a look that collectors and builders both love.

The C10 is the most desired variant, the lightest, most car-like trim with the best ride quality. K10 four-wheel-drive trucks have surged in value. Short-bed stepside models command the biggest premiums for builders. Half-ton single-cab short-beds in clean condition can now fetch prices that surprised everyone five years ago.

What to look for when buying a square body

Rust is the primary concern, specifically the cab corners, lower rockers, floor pans, and frame. These trucks were everywhere, which means they were also everywhere salt was used on roads. A truck from the Southwest or Mountain West with documented provenance is worth more than a cleaner-looking truck from the Rust Belt. Check the frame carefully, especially the rear crossmember and outriggers. Cab corners are a known weak point and easy to fake with filler.

Mechanically, the 350 small-block is bulletproof and parts are everywhere. Transmission options (Turbo-Hydramatic 350 and 400, later 700R4) are all well-supported. The biggest ongoing issue is cooling system maintenance and carburetor condition on trucks that haven't been driven regularly.

Frequently asked questions

The square body generation covers 1973 through 1987 for Chevrolet and GMC C/K series pickups. The styling was introduced in 1973 as a full redesign of the round-body trucks that preceded them, and remained largely unchanged until the 1988 introduction of the GMT400 (C/K) generation.
C designates two-wheel drive (rear-wheel drive); K designates four-wheel drive. The number following indicates weight class: 10 = half-ton, 20 = three-quarter ton, 30 = one-ton. So a C10 is a 2WD half-ton and a K10 is a 4WD half-ton, the most commonly collected variants.
The range is enormous. A driver-quality C10 in fair to good condition typically runs $8,000–$18,000. A nice, solid original in good condition sells for $18,000–$35,000. Full restomod builds and premium restored examples can reach $50,000–$80,000 or more depending on the quality of the work. Rare configurations like short-bed stepside K10s command significant premiums.
With a maintained 350 small-block and functional systems, yes, they're known for mechanical simplicity and durability. However, they lack modern safety features (no ABS, airbags, or crumple zones), fuel economy is modest (12–16 mpg), and a truck that's sat can need significant work to bring back to daily-driver condition. Most owners use them seasonally or for weekend driving.
The most common is the Chevrolet 350 small-block V8, offered in various states of tune. The 305 V8 was the standard engine in many years. Three-quarter and one-ton trucks often came with the 400 or 454 big-block. The 292 inline-six was available as an economy option. For builders, the LS engine swap has become extremely popular for modern performance and reliability.
In order of importance: cab corners (lower rear corners of the cab, these rust from the inside out), floor pans (lift the carpet), rocker panels, lower door skins, the area around the rear window, the frame from the front crossmember back, and the bed floor. A truck with solid cab corners and a clean frame is the right foundation regardless of other condition issues.

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