Drive faster and make the most of your Sierra's engine with our truck tuners and throttle enhancement parts. Modern trucks rely on computers to control how much fuel is injected into the engine. Engine tuners can control the different system functions in your pickup and make your system behave differently. By investing in a performance-focused tuner you can effectively squeeze more power out of your Sierra and make it go faster even if the tuner is the only change you make to your system. We recommend only investing in a tuner if you are going to purchase additional Sierra engine parts as well, because the tuner will enable you to make the most of all the other parts that you add to your truck as well. When you add Sierra throttle enhancement parts such as a wider throttle body and a cold air intake system to your truck, your stock computer might not know how to maximize the power of those enhancements. That's where an adjustable tuner comes into play. Many of our tuners are fully adjustable so you can control the different engine cycles in your vehicle to get the most performance out of your new upgrades. Get a professional tuner to help you maximize the engine improvements you've made to your vehicle with the tuner and you can get more performance out of your GMC Sierra than would otherwise be possible. If you want to get as much power from your stock engine as possible, you need a tuner for the task. We offer additional performance-enhancing components at American Trucks such as tuners, exhaust systems, Superchargers, Turbochargers and more to help you get the most power from your Sierra's engine.
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