I have a 2015 silverado LTZ 1500 now with14,000 miles but I am thinking about trading it for another diesel. The thing is I have never had a duramax always had Dodges. The one I'm looking at is a 2008 LTZ with 6"lift and 35's. It has 100,300 miles and I could get it for $33,500 that is being about $2000 upside down with my 1500. What does everyone think should I do it or not?