Sup guys I just bought a 2009 Yukon slt with 130K runs like a champ no lights on the dash and everything runs and sounds the wau it should. Ive only had it for 3 days its the first GM suv i own, so i took a 2 hour trip to and the next morning whe. we were leaving for breakfast it threw a cloud of white smoke and today acter we came home and the trhe suv was sitting for about an hour we went out again and it threw a white cloud of smoke its only for a few seconds and only at starts up after a long trip. The oil was only changed 1500 miles ago because i went to a valvoline place and it was on their computer that this suv had an oil changed every 3000 miles. Just wanna see if anyo e has any issues like this with their suv. Thanks ill appreciate the feed back.