GMC Sierra 2014 Automatic mileage: 231 KM First of all, may God bless us and you. Sierra, everything is explained in the ad. The engine was changed to a 2018 model. The gearbox was overhauled a year ago. The car does not complain of anything except the engine mounts now. We ask viewers not to undervalue. May God grant us and you success. Contact number 0500755809