2019-2021 Silverado & Sierra 1500 5.3L Complete Transmissions

The transmission in your 5.3L Silverado or Sierra (whether it's the 8-speed 8L90 or 10-speed 10L80) is complex, and factory units are prone to failures like torque converter shudder and CDF drum wear. Tier One offers high-quality replacement transmissions for 2019-2021 Chevy & GMC 1500 5.3L trucks that are built to verify reliability. We utilize upgraded internal components and improved assembly techniques to ensure that your new transmission is more durable than the one that came from the factory. Whether you use your truck for daily commuting or heavy work, our transmissions provide the peace of mind you need. Even a fresh transmission needs protection, so eliminate converter flex with one of our 2019-2021 Silverado & Sierra 1500 5.3L Torque Converters. Heat is the enemy of modern transmissions, so protect your investment by adding one of our 2019-2021 Silverado & Sierra 1500 5.3L Transmission Coolers. If you aren't ready for a complete swap but want to fix shifting issues, a valve body upgrade is a great place to start, so check out our 2019-2021 Silverado & Sierra 1500 5.3L Valve Bodies. To get the most out of your new transmission, consider upgrading your fluid capacity with a deep pan from our section of 2019-2021 Silverado & Sierra 1500 5.3L Transmission Parts.