'86 GMC C1500 5.7L V8
So I start my truck up this morning, and it's fine. After being parked in the driveway for the afternoon I try starting it and it won't even turn over. The seat belt light doesn't come on; the gauges in the dash don't sit up; the radio won't turn on; and there's absolutely nothing (no click or anything) in terms of ignition. WTF? The horn still works, as well as the interior dome/courtesy lights. The headlights come on as well, so it isn't the battery. I checked most of the fuses and they look okay.
Does anyone have an idea what would make all those things fail at once? Is it a bad ignition switch?
Thanks in advance.