The Ultimate Donor Generation: 1973–1987 GM Squarebody (Parts Fleet)

Need authentic, tough-to-find components for your C10, K10, Suburban, or K5 Blazer build? We are parting out classic Chevy and GMC Squarebody trucks. As one of the most popular customization and restoration platforms in the world, finding clean original sheet metal, intact trim, and numbers-matching drivetrain parts is becoming a competitive hunt.

Whether you are performing a full frame-off restoration, converting from 2WD to 4WD, or just patching cab corners, our donor inventory provides the factory structural components you need.

 Component Interchangeability & Compatibility Guide

The beauty of the General Motors Squarebody era is the incredible cross-model parts interchangeability. Review this compatibility list for your project planning:

• Front Clip Parts (1973–1980 vs. 1981–1987): Hoods, fenders, and core supports interchange easily within their specific sub-generations. 1981 saw a major aerodynamic redesign, though doors and cabs remain structurally identical from 1973 all the way through 1987 (and up to 1991 for Suburbans/Blazers).

• The Fleet & Stepside Beds: Standard 8-foot long beds and 6.5-foot short beds share bolt patterns across Chevy C/K series and GMC Sierra platforms.

• Drivetrain & Powertrain: This era houses highly swappable hardware, including legendary SBC 350 engines, BBC 454s, and bulletproof transmissions/transfer cases like the TH400, SM465, NP203, and NP205.