I pulled the sheathing off my positive battery cables to see if they had gauge identification on them and discovered this mystery fuse I can't find it in the owner's manual. It's not aftermarket, as I've owned my H3 since new. It's got a 10 amp fuse inline on 10 or 12 gauge wire. The wire is leading into it is orange, and red coming out. I could pull it and start checking EVERY system on the truck, but it was easier to post this thread. Anybody got any ideas?

 

i think my 07 book shows an "extra" onstar fuse.
ill dig thru pages till i find it!. it was behind the batt.

book says onstar fuse, no number, red in, orn out.
direct from batt, not thru main fuse box!!

edit 2 , another page,orn in red out!!, in parallel with other power wiring, to vcim

if in parallel,?? if u pull it im guessin,nothing happens, backup for onstar??

your next!