Hello, I recently took out the factory 6 disc changer from my 05 Suburban and replaced it with the oem nav unit from a 05 Tahoe. It seems to work fine if I do the trick with the fuse, but whenever I go to turn the vehicle on, the theftlock activated screen comes up and won't go away. The dealer spent two hours trying to program it and couldn't figure out how to do it. Anybody had the same issue or has done the same conversion on their vehicle? Any help or insight would be greatly appreciated! Thanks Tom