BLUETOOTH, 8-Speed Automatic with Overdrive, 4WD, jet black Leather. CarTown - We are the Used Car Giants! We have financing for all Customers! CARFAX One-Owner. Odometer is 36369 miles below market average! 2018 GMC Sierra 1500 Onyx Black SLT 15/20 City/Highway MPG EcoTec3 6.2L V8 8-Speed Automatic with Overdrive 4WD .Trust In a business with over 40 years experience. We also have the largest selection of used cars in North Louisiana.