Please help! I have a 2008 Chevy Express High Top Conversion Van Explorer. I try to listen to the XML radio that is built into dash. I get clear music after loading for about a minute...then static! Constant static during music. It doesn't matter where we drive so it's not interference. I took it to two certified Chevy dealers and a Bose radio expert. Nobody wants to even attempt to diagnose. This is behind frustrating! Anyone had this issue?