I finally did the navigation head unit and Bose Lux amp mod to my 04 Suburban. The navigation disk that came with the unit from the wrecking yard is version 3 and I would like the most current one which is version 10.4 GM part number 22846887. The GM site still wants 180 bucks for this 5-year-old information which I can't seem to bring myself to purchase since all of the upgrade components only cost me 60 bucks. I purchased an eBay copy for like 5 and it does not work surprise surprise. I found the following site https://www.autonavdvd.com/home/24-2...-22846887.html which is selling this version for 40 dollars. Have any members used this site ever and if so, did the product work?