Hugh~ You live in Minneappolis and the weather can be pretty nasty for a few months...a piece of mind is worth alot!!!
I know alot of car companies are offering that, 3yr. no interest deal right now and some even offer no pmts. for a year on-top of that!!
But, perhaps the money that you put into the Burban will last...but, there's always the chance you may be wasting that money....once again, a piece of mind is worth alot!!
I haven't actually seen your vehicle. I am just going by what you are saying about it. I used to sell cars for a Dodge Dealership and I know I've taken in some trade-in's that, were a hands down good decision to get out of!!
Good luck with your decision!!