The Dashpaq for GMC/Chevrolet/Cadillac and Hummer gas trucks and SUVs is designed to cover the 4.3L, 4.8L, 5.3L, 6.0L, 6.2L, 7.4L and 8.1L gas motors from 1999 to 2016. This dual-purpose product delivers big power and also provides an in-cab monitor to keep an eye on critical engine parameters like coolant temp, transmission temp, battery voltage, and more. With a color screen, a button interface, and easy to use menu structures, the Dashpaq is the perfect product for the GMC/Chevrolet/Cadillac and Hummer gas truck and SUV owner looking to optimize power across the RPM band, help improve fuel mileage, and improve towing power when pulling a boat, trailer, or camper. like coolant temp, transmission temp, battery voltage, and more.