The market and our competition didn't think it was possible, but here it is. Evolution CTS3 for 2020-2023 6.6 Gas GM trucks with in-vehicle ECM unlocking capabilities! Our industry leading in-cabin device, the Evolution CTS3 is now an all-in-one device that can unlock your ECM, and flash our performance calibrations to the ECM and TCM then monitor everything going on under the hood with our state of the art touchscreen monitor afterwards. This all-new process completely changes everything you once knew about tuning your 6.6L L8T gas truck and will lead our industry into the future with even more capabilities, saving you time and money when it comes time to modify your truck. The Evolution CTS3 offers noticeable power gains (up to 28hp/50tq), with improved throttle response, better fuel economy and total control over your driving experience. Enable our 'Remember Last Setting' feature that allows your truck to remember your Drive Mode settings every time you start your truck, caliibrate for larger tires, even adjust your top speed limiter. The Evolution CTS3 is a great tuning option for the guy that wants everything in one device, with simple and easy to use touchscreen interface, great visuals, and pre-loaded tunes to meet every owners specific needs. If you're looking to improve your daily driving mileage, your towing performance or just shred some tires and bring out the most in that big V8, our Evolution CTS3 offers it all. A PC and our downloadable Update Agent software will be required in order to complete this unlock and tune process **Device can unlock and tune only one vehicle. Once the ECM is unlocked and flashed, the flash can be returned to factory settings, but the Unlock process can not be reversed. If VIN lock and ECM Unlock has been completed, device is non-returnable