"When you consider any of it's flaws, it is most likely the best overall package out there. I bought my 05 Z71 Tahoe new and have only had issues with the navigation and heated seats when the sunroof got left open in the rain. I have driven it from West Coast to East Coast and back twice now, and never a problem. Safe, comfortable, and reliable.
My only complaint is that in order to play a CD while using the Navigation, you have to put it in the Rear DVD player and reach back to push the buttons to control the CD. This is a very poor design flaw because there is no slave unit available for in dash with the Delphi Navigation unit. This was a real shocker for a vehicle with so many bells and whistles!
Overall, we love it and know we can count on it to get us where we are going."