The Pulsar LT is an all-new in-line module for 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500 that offers complete adjustability of many of your trucks features. Never before have you seen a standalone module like this in our market. Without modifying your truck's ECM, Pulsar LT offers you the ability to adjust throttle response, tire size, gear ratio, TPMS, and your top speed limiter. But that's not all, Pulsar LT can also be used to disable Auto Start/Stop and Active or Dynamic Fuel Management. The Pulsar LT connects directly to the vehicle computer system and makes its change in-line with the other on-board vehicle modules. Utilizing your steering wheel controls, Pulsar LT owners can make the changes they need to customize their driving experience. Physical gear ratio changes made in the 2019-2020 trucks will affect your cruise control functionality. This is an issue within GM's platform. While this device will calibrate your speedometer for an accurate display after making a gear ratio change, it will not re-enable the non-functioning cruise control.