GMC Sierra 2007 Automatic Gasoline mileage: 300 KM or more It has a project and needs some repairs. Additions:- 1- 6-liter engine 2- New headers 3- Headers 3- Crash muffler 4- Gear cooler 40 5- ZR1 cam 6- Melling oil pump 7- The differential has been modified from mud to sand. 8- The bumper horns have been removed and a front plate installed. 9- Gauges 10- Two front hooks for tow hooks. There are some notes, for the serious buyer, sold complete with everything mentioned.