Speedometer Calibrator | Gas | Chevy/GMC 2500HD/3500HD (17-18)

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Speedometer Calibrator | Gas | Chevy/GMC 2500HD/3500HD (17-18)Put the finishing touch on your lifted vehicle with Rough Countrys Speedometer Calibration Device! This easy to use Speedometer Calibrator helps you quickly and easily reprogram your vehicles speedometer to match the output of your larger tires. Your vehicle's computer is designed to track the speed based on your stock tire height. When upgrading to larger tires, there will be a discrepancy between your actual speed and the readout on your

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