Chevrolet to Discontinue Medium-Duty Silverado 4500/5500/6500 HD Models by 2026

General Motors (GM) will discontinue its medium-duty Chevrolet Silverado models—the 4500 HD, 5500 HD, and 6500 HD—by September 30, 2026, ending a decade-long partnership with International (formerly Navistar). The decision follows GM’s choice not to renew its manufacturing contract with International, which began in 2015 and involved joint development and production of the Silverado MD and International CV Series trucks.

International will also halt production of its CV Series on September 10, 2026, and has sold the Springfield, Ohio, plant where both trucks were built to Canadian defense contractor Roshel, effective March 30, 2026.

Decline in Sales Drives Discontinuation

Industry reports suggest declining demand for GM’s medium-duty trucks contributed to the decision. According to TFL Truck, Chevrolet sold just 1,273 Silverado MD trucks in the first quarter of 2026—a 37.4% drop compared to the same period in 2025. During the same quarter, Ford sold 2,331 F-650 and F-750 trucks, while International’s MV Series competes directly in the Class 6 segment.

Silverado MD Specifications and Features

The Silverado MD lineup, unveiled at the 2018 Work Truck Show in Indianapolis, is powered by a Duramax 6.6-liter turbodiesel V8 producing 350 horsepower and 750 pound-feet of torque, paired with an Allison six-speed automatic transmission. Buyers could choose between four-wheel drive, regular cab, or crew cab configurations, with wheelbases ranging from 165 to 243 inches. Gross Vehicle Weight Ratings (GVWR) varied by model: 14,001–16,500 pounds (4500 HD), 17,500–19,500 pounds (5500 HD), and 21,000–23,500 pounds (6500 HD).

International’s Springfield Plant Sold to Roshel

Most of the Springfield, Ohio, plant’s production capacity was dedicated to Chevrolet-badged trucks, prompting International’s decision to sell the facility. International has operated the plant since 1961 and has weathered past reorganizations, including cuts in 1982 that sidelined its Fort Wayne, Indiana, plant. Roshel, a Canadian defense contractor, acquired the two-million-square-foot facility and a co-located specialty truck center on 500 acres of land.

GM’s Remaining Commercial Truck Offerings

GM will continue selling the Isuzu-derived LCF (Low Cab Forward) series in Class 4, 5, and 6 configurations for the 2027 model year, marking its lone remaining joint-venture commercial truck. The discontinuation of the Silverado MD models means GM will exit the mega chassis cab segment, where Ford remains a key competitor.