Review on 🚗 Speedometer Calibrator for 2019-2020 Chevy Silverado, GMC Sierra 1500 & 2020 2500HD | Rough Country Code Reader 90045 by Richard Eledge

Weird Review Questions. Accuracy: Appears to be within 1 mph of actual. Not yet used Thickness: ? What for what? Here's an overview: After connecting to a computer and running the update, I ran the program and found it very easy to select the tire size and save the settings. After that I spent about 5 minutes under my truck's dash trying to find the plug, unplugging it and plugging it back into the box before plugging everything back in and refilling the box. Works as intended and no error codes in my 2020 Sierra HD Denali.