Speedometer Recalibration Device for all 6.5 equipped vehicles 1993-2002 including C/K pick-ups, Vans, Tahoes, Suburbans and H1 Hummers.Finally a simple way to recalibrate your speedometer when tire sizes are changed from stock.

Read the correct speed.
Changing tire sizes or gear ratios in a computer controlled vehicle can play havoc with your ABS, automatic transmission, and your spotless driving record. Fear not, these speed control units can correct your speedometer to within one percent accuracy. Just install it in line with your computer and you're ready to recalibrate. These units can be used over and over again.