07NBSChevy

So I'm looking at purchasing a factory Nav Unit for my NNBS, ( only thing my truck doesn't have from being fully loaded). Part #19169886. I have everything it says needed for it to work. Bose and all other RPO codes. Dealer says its plug and play according to my Vin #. But I want to make sure that's really true and they are not just trying to sell me a $2000 Nav unit that's non refundable. Truck is an 07 nnbs ecsb LTZ.