Nice deal man. 13k is good trade in. I brought my Denali up to Ohio from Georgia and its got 162k on it now, and i got an offer for $14k with 155k on the clock but turned it down. I just like too much. Dealership offered me $11 on trade in and I couldn't do it. These things are made to drive forever and sell when there isn't much value left. As said the way to get your money out of it is to drive the piss out of it. I love mine and unless I find a stupid deal on a new Powerstroke, it will be around and ill buy a truck in addition to it. Nice tahoe and the wheels look good on there.