Chevrolet is dropping three of its biggest trucks and even some vans we thought would outlive the end of the world. The toughest, heaviest-hauling Silverado models of them all are going away, leaving Ford and Ram to battle it out in the most truck of truck segments.Don't worry, Chevrolet HD pickup fans. This announcement covers medium-duty bowtie trucks; the big bruisers designed to carry big loads with open beds, boxes, dump beds, or other commercial-type upgrades. And it's not just trucks going away. Some Chevy Express and GMC Savana vans are going away, too. Here's what you need to know. Production Is Ending, And The Plant Is Closing ChevroletSpecifically, the Silverado MDT line consisting of the 4500, 5500, and 6500 trucks are dead after this year. As for the positively ancient Express/Savana vans, this affects some of the cutaway vans – those built with just a cab, leaving the rest of the frame open for upfitters to, well, upfit.Though these vehicles typically aren't sold to retail customers, this is still a very big deal. For most of the company's life, Chevrolet has made a complete line of trucks. That includes medium-duty trucks that help carry goods from warehouse to worksite, and from distribution center to storefront. It dropped out of the MDT class in 2009, but 10 years later, Chevy dove back in.Now, nearly another 10 years later, Chevrolet is bailing out again. TFLtruck first spotted that the medium-duty trucks were being canceled, with the lineup set to wrap-up production at the end of September.ChevroletCarBuzz has confirmed this with GM, which provided a statement that helped fill in some of the blanks."GM will end production of the Chevrolet Silverado 4500 HD, 5500 HD, 6500 HD and select Chevrolet Express and GMC Savana Cutaway van variants following the September 30 conclusion of our manufacturing agreement with International Motors."-General Motors spokespersonGoing forward, GM is "evaluating future portfolio options for Medium Duty," but not saying much else. If you're worried about a lack of cutaway vans for U-Haul, RV, and other applications, don't worry. Production for some of those will continue at GM's Wentzville, Missouri, plant, which builds the passenger and cargo versions of the vans.To be clear, the standard vans are still full-speed ahead production wise, despite being 23 years old. And that only goes back to the first (and only) facelift. The Savana/Express platform celebrates its 30th birthday this year.Sales for Chevy's workhorses haven't been great. Last year, Chevrolet sold 8,341 units of the three medium-duty trucks. That figure was down 19% from 2024, but it wasn't out of the trend for the trucks since they were launched.It's not sales, though, that is behind the end of production. The MDT trucks were developed along with Navistar International and are also sold as the International CV. GM designed the powertrain, mostly the 6.6-liter Duramax turbodiesel V8, while Navistar designed the chassis and builds all the trucks at a facility in Springfield, Ohio.Chevrolet Navistar International is selling its factories in Springfield, though it isn't the sale driving the end of production. In March, International said that "with the end of our contract manufacturing agreement, we have been working diligently to find a suitable path for the Springfield Assembly Plant," which suggests GM wasn't going to renew rather than the other way around.The plant was purchased by a Canadian company called Roshel. The company builds combat-ready armored vehicles and has extensive military contracts, including sending more than 1,800 armored vehicles to Ukraine and, more relevantly, extensive contracts with the US Department of State. Roshel said it plans to support US defense and commercial armored vehicle production at the plant. Express And Savana Will Live On Because They Are Immortal GMC GM's Express and Savana vans had their production split in 2017. To free up room in the Wentzville plant, production of cutaway vans – used by commercial upfitters to add specialized equipment – was moved to the Navistar plant. GM explained to CarBuzz that production will continue at Wentzville unchanged, but none of the production from Navistar will be moved back.If you want a pickup-style chassis cab, then Ford and Ram both offer Class 4 and Class 5 models in the Ram 4500 and 5500, and Ford F-450 and F-550 lines, respectively. Ford will now be the only one of the big three with a big-rig style truck, offering the F-650 and Class 7 F-750. Chevrolet will continue to offer its Low Cab Forward (LCF) commercial trucks, which are based on vehicles from Isuzu.