GMC C/K 3rd Gen

The 3rd generation of GMC C/K trucks, sold from 1973 to 1987, is affectionately known by enthusiasts as the 'Square Body'. This generation marked a significant modernization for GM's truck line, introducing features like improved aerodynamics, better ride quality, and more comfortable interiors. With a production run of 15 years, a vast number of configurations were available, from basic C10 half-tons to heavy-duty K30 1-ton 4x4s, ensuring a model for nearly every purpose.

Collectors are drawn to the Square Body's simple, rugged design and the nostalgia associated with it. They are mechanically simple, parts are widely available, and the aftermarket offers endless options for restoration or modification. The market has seen steady growth, with an average sale price hovering around $20,000. Clean, original examples, especially short-bed V8 models or those with desirable trim packages like the Sierra Classic, command the highest prices.

While top-tier restorations can fetch over $60,000, many driver-quality trucks and project vehicles remain affordable. This accessibility keeps the Square Body popular with a broad range of collectors. The market distinguishes heavily between short-bed and long-bed models, with short-beds consistently bringing a premium. Well-documented, low-mileage survivors are becoming increasingly rare and sought after.

Prices for 3rd generation GMC C/K trucks typically range from $6,500 for projects to over $66,000 for top-tier restored or survivor examples.