Found a decent deal on a 2014 Denali with 65k miles. I have a 2011 yukon SLT now. Are there any issues I need to be looking for? (I know the dash is cracked....). Also couple questions about that model year: Is it all time AWD? I don’t see a 4x4 selector knob. Does this year Denali have magnetic rear shocks or is it air ride? Any known issues with the infotainment center or DVD player? Anybody buy an extended warranty on a Denali after the 36k warranty ended? If so, cost? Any tips/advice on this is greatly appreciated.