Reviewed By Kerry D (WHITEFISH, MT) Reviewed for a 2006 Chevy Silverado —7/22/2014 5:11 AM
Very satisfied. The Hypertech Speedometer Calibrator arrived quickly and was very easy to use. The instructions were clear and walked me through the programming process smoothly. I tracked my speedometer accuracy with my GPS and before calibrating it it was off 15%, which meant I was traveling 69 mph when my speedometer dispayed 60 mph. After programming with the Hypertech, the speedometer is spot-on. I can also easily reprogram when I install my smaller diameter winter tires.