I have the HU and I had it installed in my ford Explorer and it worked just fine. Well, I just picked up a 2000 Escalade and now my volume buttons don't work and the screen won't come out. I tried 2 different harnesses with the same results... I just had the unit sent out, fixed, and returned from Clarion for a Laser issue. What issue am I having now? Anyone else have this problem? I feel like throwing it again't the wall. It's only 2 years old.