SLE 2018 Automatic Gasoline mileage: 140 KM 4WD Peace be upon you For sale: Sierra differential, fits models 2014 to 2018. The differential is clean, only 130,000 km driven. Minor flaw: The ring gear has a slight whine starting and will need replacement over time. The CV joints, seals, everything is sound and guaranteed. Selling at a good and urgent price. Only serious buyers should contact.