I'm sure this might have been posted already, but I need help. My Burban has been sitting for about a month now, but I have a no crank/start situation. I have no power to more than half my fuse box under hood. With my key on, everything seems normal, lights, locks, blinkers, horn wipers, and radio. I did switch the wire harness to aftermarket radio cause it would stay on with key off. The anti theft light came on and was solid on. I did key on 10 minutes till light went off, turn key off for 10 seconds and back on 3x, which turned the light off but no change. Oil pressure sensor and emission leak codes is all that shows, code wise. Is there any more I can do before I get dealership involved. Thanks.