2005 chevy blazer 4x4 will blow 10 amp started fuse randomly, sometimes changing fuse will give you immediate starting resulds and other times you need to wait hours before replacing fuse

See if it has the double stacked positive cable ends at the battery, Sometimes one won't make a good connection, 1 goes to the starter the other feeds the rest of the electrical system, Also check make sure your ignition switch isn't going bad, NOT the key and tumbler but the electrical switch itself...Make sure your starter wiring is tight also..

Try to use a 20 fuze one if it burns out that quick use a bigger recemend using a 20 or 25 fuze

Mine was the o2 sencor on the pipe not on Cadillac Converteri sprayed p B a blast on it and it started blowing then ish infuse because I tryed for 2months to get the o2 sencer off well right afterI sprade it. It started blowing the fuse. I unpluged it and I stoped so check your try unpluging i

i had a problem like this with my jeep. ended up being a bad ground strap. try replacing or cleaning them up.

need email address to send diagrams, need to know what parts of electrial you need

check transfer case electrical switch, sometime if it bad it will also blow the fuse. don't recommend you put any higher fuse than recommend, If the fuse blow there is a short some where and by putting higher amp fuse you might short or burn something else beside the fuse. if that check out than check your transfer case motor, might lock up and not allowing the motor to turn instead it short the fuse. don't drive the car, just leave it in park, put correct fuse amp back in and unplug transfer case electric switch and turn the key on (dont start the car) and see if the fuse blow; if not plug it back in and see if it blow the fuse. if that is not the case, unplug transfer case wire, and do the same and see if it blow the fuse.

when you replaced the plugs/wires. Did you do the cap and rotor too
Also have your timing checked

Your 20 amp fuse will not blow if glowplug wire shorts. each plug draws 15 amps which is 120 amps total.I think there are in line fuses for them. Try to wring out where each output from the fuse goes, disconnect all and reconnect one at a time till it blows.That should point to your problem process of illumination! Good Luck!!

have someone check the starter/solenoid