Rock, that 2 circuit fuse box, (yes it has two) glass fuses under the cover. It was used on 1950 and later trucks. Prior to that, there was a 5 circuit fuse box, for Stop, Tail, Park, Low Beam, and High Beam. Apparently either the engineers at GM decided that fuses weren't needed for the latter 3 circuits, as there was a circuit breaker on the headlight switch. Either that or the bean counters prevailed.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.