2014-2018 Silverado & Sierra 1500 5.3L Complete Transmissions

The 2014-2018 Silverado & Sierra 1500 5.3L trucks pack a good amount of punch, but both the 6L80 and 8L90 transmissions helping power them are not known for being the most reliable things in the world, and things can get pretty dicey when you start towing heavy or adding a whole bunch of horsepower and torque to your tough Silverado or Sierra 5.3L build. That's why we here at Tier One have a lineup of built transmissions for 2014-2018 Silverado & Sierra 5.3L 1500s that will give your tough GM truck the reliability and power-holding that it truly deserves. Each one of our 2014-2018 Silverado & Sierra 5.3L built transmissions have a full suite of reliability improvements and power-holding upgrades that allow you to take your Silverado & Sierra 5.3L build to the next level. Make sure you also check out our 2014-2018 Silverado & Sierra 1500 5.3L Transmission Rebuild Kits or 2014-2018 Silverado & Sierra 1500 5.3L Transmission Coolers!