Livebai8, seems we are in the same area, and same issue. My '03 Tahos has similar issue. Very intermittent issue. Sometime the driver gets in, all lights work, alarm, interior lights,radio on, dash and instruments light up, all work. Put the key in and turn it and NOTHING at all happens. No clicks, nothing. No lights dim, no solenoid click, radio keep playing if on etc.. Wiggle the key, the column shifter, and turn the steering wheel back and forth a bit, in and out with the key, and almost all the time one of those seems to make it happen. Instant crank and run. I cannot replicate it in a shop or show it to a tech. It just does it when it wants. I am of the opinion it is in the ignition key assembly somehow.