We traded my wife's Hyundai Santa Fe for this Tahoe 3 years ago to use as a tow vehicle for our travel trailer. We've replaced the stock mirrors with power folding mirrors acquired from a forum member and we had the upholstery replaced with leather. We've decided to keep this vehicle for a few more years as it is in really good shape and mileage is reasonably low (around 60K). My wife is the primary driver and wants to add a Nav unit. The install will be done by CarToys or someone else that is in the business, not by me. Would like to keep the total cost (including installation) to $1000 or less if we can get a good quality unit for that.