GMC Sierra 2025 Automatic Gasoline mileage: 13 KM AT4 2025 Automatic transmission Gasoline Mileage: 13 thousand kilometers 4WD GMC Sierra AT4 2025 for sale Automatic transmission Gasoline Mileage: 13 4WD First owner There is a small scratch the size of a palm that needs paint or polishing only. The car is like new and guaranteed in all aspects, and I will bear the cost of inspection if it is found to be different from what I mentioned.