Eight AGC (1/4" x 1-1/4" fast blow) fuses... two 4AMP AGC, three 15AMP AGC, and three 20AMP AGC.
The 25AMP fuse should be an MDL (1/4" x 1-1/4" slow blow) for the wiper motor circuit. You'll probably find that someone has replaced the MDL fuse with an AGC fuse. Fast blows can blow unnecessarily in this circuit. Motors have a much higher start than run current so you may find the previous owner has put a 30A AGC fuse in this slot or has wrapped the incorrect AGC fuse in aluminum foil because it keeps blowing out. The MDL fuse type will either have the element wound around a fiberglass rod or it'll look like there's a spring in one end of the fuse... both of these designs dissipate heat from the short burst of, larger than rated, inrush current needed to start an electric motor.
From 1967-1975 trucks equipped with Ammeters will also have two small 4AMP SFE glass fuses in GM Delphi Packard Electric inline molded rubber holders. These are in the engine bay on both ends of the 67-75 Ammeter shunt.
http://rmcavoy.freeshell.org/Truck_gauges.htmlThe owners manual and the factory wiring diagrams have the amperage for each fuse panel socket if the printing has worn off the panel.
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