2021 Automatic Diesel mileage: 90 KM GMC Sierra T4 Double Cab, Agency Full, Gasoline 2021 Type: Sierra T4 Double Cab ✅ Mileage: 90 thousand ✅ First Owner ✅ Body is agency, condition guaranteed ✅. Gasoline ✅ Specifications: T4 Carbon Pro 6.2, 10-speed gearbox, panoramic sunroof, full specs, double gear, seat cooling, rear camera, mirrors. For sale to the highest bidder.