6-Speed Automatic Electronic with Overdrive, 4WD, Dark Ash Seats With Jet Black Interior Accents Leather. Priced below KBB Fair Purchase Price! Odometer is 17640 miles below market average! CARFAX One-Owner. 2018 GMC Sierra 1500 SLT EcoTec3 5.3L V8 4WD Stone Blue... via vAuto, Inc.