I don't know if this is to late, but I have had the same problem with my 2003 HD Crew Cab. Bose radio system. First radio problem, no audio output, display is fine. Two days later, truck won't start but radio plays. Towed to dealership. Diagnosis "shorted resistor in blower control circuit GM part #89018597" part replaced under warranty. One year later while on vacation out of state, radio quits, go to local dealer he looks up history on his computer,orders in same part on my request. Next day battery dead, towed in. Replaced part charged battery on my way.
I have seen on other forums where people with the same problem have payed big bucks to change out the radio, and/or the battery and alternator.
Good Luck JJ
I have seen on other forums where people with the same problem have payed big bucks to change out the radio, and/or the battery and alternator.
Good Luck JJ