(90009t) Speedometer Calibrator | Chevy/Gmc 1500/2500hd/3500hd (07-18)

Corrects Speedometer / Odometer. If you have installed a set of tires that are larger or smaller than original equipment tires, or if you have installed a ring and pinion gear set with a different rear gear ratio, s Speedometer Calibrator allows you to correct your speedometer and odometer readings. The vehicle s computer calculates your speed based on the diameter of the stock tires. If you ve installed taller or shorter tires, or changed the rear gear ratio, the vehicle s computer doesn t know how fast your vehicle is actually going. As a result, the speedometer/odometer readings will not be accurate. Diagnostics Tool. The Speedometer Calibrator can also be used as a diagnostic code reader. Save yourself time and money by reading and clearing your own Diagnostic Trouble Codes (DTCs) rather than paying a dealer to do the same. It s as easy as a few simple steps. Easy to Load; Easy to Restore. When you make changes to your vehicle, the Speedometer Calibrator