GMC Sierra Z71 2017 Automatic Gasoline mileage: 164 KM 4WD Peace, mercy, and blessings of God be upon you. I have a 2017 GMC Sierra double cabin, 4x4, for sale. Mileage: 164,000 actual miles. Engine, gearbox, 4x4 system, differentials, chassis, and airbags are all in original, factory condition. The body is entirely original, except for 3 pieces that were painted at the dealership. Maintenance was done at the dealership up to 100,000 miles, then at an authorized center. The vehicle is clean and a great find for a user. It still has its original plastic coverings and spare tire, and is rarely driven.