Rough Country Speedometer Calibrator 19-22 Chevy GMC 1500 2500HD Rough Country Red 2WD 4WD 90045T

The Rough Country Speedometer Calibration Device is an easy-to-use tool designed to reprogram your vehicle's speedometer to accurately reflect speed after installing larger tires. It connects directly to the vehicle’s Diagnostic Link Connector Port for a quick, plug-and-play installation. Beyond correcting the in-dash readout, it updates the vehicle’s ECM, ensuring accurate shift points and proper electronic stability control. The device also includes a function to reset the speedometer back to stock settings. It is compatible with most PCs for software updates and comes with a 1-year warranty.