2019-2021 Silverado & Sierra 1500 5.3L Tuners & Monitors

The 5.3L V8 under the hood of your 2019-2021 Silverado or Sierra 1500 has a lot of horsepower and torque going for it, but there's even more power and performance locked away that's just waiting to get unleashed with the right performance tuning. Tier One's selection of 2019-2021 Silverado & Sierra 1500 tuners and performance monitors can give your tough 5.3L Silverado or Sierra an impressive bump in horsepower and torque while also adjusting throttle response and transmission function so that your Silverado or Sierra 1500 build feels like an entirely new truck. These Silverado & Sierra 1500 tuners work by adjusting key aspects of your truck's engine management software like ignition timing, fuel curves, throttle sensitivity, and a whole bunch more so that you get the most out of your Silverado or Sierra build. Also check out our 2019-2021 Silverado & Sierra 1500 5.3L Transmission Dipsticks or 2019-2021 Silverado & Sierra 1500 5.3L Transmission Coolers!