AT4 2021 Used Automatic Gasoline mileage: 165 KM For sale, GMC Sierra 2021 At4. Original color is gray, with black PPF applied. The color has been changed on the registration. The vehicle has no issues. It has a dent on the driver's door, shown in the summary. It has 165,000 km. Distinctive license plate. Sale is without the license plate. Contact via private message. The vehicle has been converted with a 25 grille, bumper, and headlights. The highest offer so far is 110 in its current condition.