I have a 2006 envoy, this morning I went to start it and the battery was dead. After a jump I noticed the blower motor was on while it was set to off, power windows and locks are not working, all gauges were not working and my custom radio unit was displaying the backup camera no matter which gear I was in. Is there any specific thing I could look into to find out what's wrong? I'm only moderately car savvy so I can't think of any one thing to look into, hoping it's not some undiagnosable thing I'd have to find to take care of.
