Shop for Calibration Devices for your 2006-2007 Chevy/GMC 6.6L LLY/LBZ Duramax. Calibration devices can be an essential tool for many truck enthusiasts. They allow you to calibrate your truck for large aftermarket tires, read/clear diagnostic trouble codes, adjust your speed limiter, and more. Devices are available for a wide variety of vehicle applications. They easily install in minutes, and some have the ability to be updated via the internet. Best of all they provide the option to return the vehicle back to stock settings if required. When installing a lift kit and adding larger tires and/or changing the factory gear ratio you can run into common issues such as the speedometer reading incorrectly and erratic transmission shifting. A calibration device lets you quickly and easily recalibrate your speedometer while also restoring accurate shift points and proper function of the electronic stability control. Shop all the top brands such as Hypertech, Superchips, and more!