General Motors offers a wide range of versions of the Chevrolet Silverado, including medium-duty variants that it doesn’t fully manufacture on its own. The Silverado 4500 HD, 5500 HD, and 6500 HD, Class 6 commercial trucks, are built on a shared platform alongside International’s CV Series, a partnership that is now nearing its end.
Reports from TFL Truck and Transport Topics indicate that production of the Silverado MD lineup will conclude on September 30, 2026. This follows GM’s decision not to extend its agreement with International, originally established in 2015 when the company was still known as Navistar.
That deal covered joint development and assembly of both the CV Series and Silverado medium-duty trucks. International is also winding down its CV Series, with production scheduled to stop on September 10, and it has already sold the Springfield, Ohio, manufacturing facility to defense supplier Roshel, with the transfer effective March 30, 2026.
The decision not to renew the partnership appears to be influenced in part by weakening demand for these trucks. In the first quarter of this year, Chevrolet reportedly sold just 1,273 medium-duty units, a significant drop of 37.4% compared to the previous year.
In contrast, Ford Motor Company sold 2,331 units of its F-650 and F-750 models over the same period. There is also overlap in the market, as International continues to offer its MV Series in the same Class 6 segment.
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The Silverado MD line debuted at the 2018 Work Truck Show and is equipped with a 6.6-liter Duramax turbodiesel V8 producing 350 horsepower and 750 lb-ft of torque, paired with an Allison six-speed automatic transmission.
Buyers can choose between regular and crew cab configurations, available with wheelbases ranging from 165 to 243 inches. Gross vehicle weight ratings vary by model: 14,001–16,500 pounds for the 4500 HD, 17,500–19,500 for the 5500 HD, and 21,000–23,500 for the 6500 HD.
Most production at the Ohio facility was dedicated to Chevrolet-branded trucks, which helps explain International’s decision to sell the site. The plant has been operating since 1961 and survived multiple corporate restructurings over the decades before transitioning ownership.
It has now been acquired by Roshel, which will take over both the main assembly operations and a related specialty truck facility spanning two million square feet across 500 acres.
Despite exiting this segment, GM will continue offering a joint-venture commercial vehicle: the Isuzu Low Cab Forward (LCF) series, which is expected to remain in Class 4 through Class 6 configurations into the 2027 model year. However, GM will no longer participate in the heavy chassis-cab space where Ford remains active in the U.S. market.
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