You guys really have me thinking now if the fuse block thats in my 55 was an add on or what? In any case I still plan to use it, had I known the new wire harness was not a part of the fuseblock I would have marked the wires somehow.I'd even called up a Tech. there at chevy duty and he said no wires in the harness terminated to the fuse block and didn't even know if trucks that year even had fuseblocks?We'll keep your replys coming I really appreciate all of them. THANKS INLINERS.