aFe Scorcher Blue Bluetooth Power Module 2019 GM Silverado/Sierra 1500 L4-2.7L (t)SCORCHER BLUE App: The aFe POWER SCORCHER BLUE app is free on the APP Store and Google Play store and allows the smartphone device to become a handheld remote for the module. It also displays turbo boost gauges (MAP and TMAP) and fuel pressure for diesel vehicles, allows you to customize each power mode, upgrade to the latest version and even measure 0 to 60 and 1 4 mile times. Installation Instructions This Part Fits: Year Make Model Submodel 2020