99 k1500 GMC Suburban, 5.7l, today it wouldn't start. For the most part a trouble free car. There's absolutely no power, no lights, no stereo...nada...When I open the door, I can hear relays clicking, and when I turn on things...stereo, headlights, etc....I can hear similar relay clicking noises. I checked fuses and couldn't find any that looked bad. The fuse panel on the end of the dash, inside the drivers door, there are 2 silver rectangular fuses...the top one I pulled out and the relay clicking stopped. Can this one be bad and be the cause? I'm hoping it's a simple solution, thanks in advance for the helpful info.