CARFAX One-Owner. Clean CARFAX. 8-Speed Automatic, 4WD, Jet Black Leather. Onyx Black 2021 GMC Sierra 1500 SLT 4WD 8-Speed Automatic EcoTec3 5.3L V8 Dublin Chevrolet GMC Nissan has been serving the local community for over 15 years!! Odometer is 18482 miles below market average!.