If you need a new transmission for your Chevy or GMC truck manufactured between 2011-2019, Next Gen Diesel has you covered. We carry aftermarket 2011-2019 Allison transmissions and parts to help you get the most out of your American-made truck. We have transmissions compatible with engines that have varying amounts of horsepower, so you’ll find one that works for you. Next Gen Diesel’s options work for engines with 550 to 1500 HP. If you’re looking to rebuild your transmission yourself, opt for one of our 2011-2019 allision rebuild kits. These kits include everything you’ll need to get the job done right. Check out our selection of aftermarket 2011-2019 Allison transmissions and parts today!