Experience a new level of performance with Stealth Performance Products' tuning solutions, exclusively designed for the GMC Sierra 5.3L (2019-2021). With the stock L84 5.3L Sierras' in mind, we meticulously developed these tunes to elevate your overall driving experience. Feel the surge of power at wide open throttle and notice the refined improvements at the bottom end, with enhanced throttle response and more rapid shifting. Additionally, you'll notice the low-end torque production, ensuring your Yukon performs at its peak potential.
Programming the Stock ECU with our calibration will net you up to 20 HP with just a flash! (results vary based on modifications and other variables).