C6

GMC’s C6 was the medium-duty conventional-cab member of the company’s long-running C-series truck family. The nameplate traces back to the all-new 1960 model-year GMC truck lineup, when GMC introduced a modern cab-over/conventional-era truck range that included light-, medium-, and heavy-duty work trucks. In GMC’s medium-duty catalog, the C6 represented the conventional cab chassis used by commercial buyers for vocational bodies, service work, and other upfit applications. Over the years, the truck evolved with the rest of GMC’s medium-duty line, while keeping its focus on durability, chassis flexibility, and body-builder friendliness rather than passenger-car style or comfort. By the late 1990s and early 2000s, GMC documents still identified the medium-duty C6/7 family in production, with engineering sheets for the C6/7H000 variants. The nameplate ended when GMC reorganized its medium-duty lineup for 2003, replacing the former C6 with the C6500 as part of the new TopKick/Kodiak-era series structure. As a result, the C6 is best understood as a classic GMC work-truck designation that bridged multiple generations of commercial truck design from the early 1960s through the end of the old C-series medium-duty era.