Reviewed By William B (Olean, NY) Reviewed for a 2005 Chevy Silverado —4/1/2010 3:56 AM
I tow a travel trailer with a 1/2 ton Silverado. The dealer said he couldn't adjust the speedometer to display the correct speed. After 15 minutes with the Hypertech Speedometer Calibrator, I had the tire size, the rear-end ratio and transmission type set and the display reading better than it did when new. The ability to read and clear trouble codes is an added bonus.