I need help finding a accurate radio wiring diagram for my 98 Chevy, every blue print i have found has wires that my truck does not, i started trying to wire up some subs but i needed a new radio and for some reason instead of buying a adapter i cut the head off my original harness and now need help figure out which wires are which so i can wire a new head of my harness in. not having a radio blows!!!!! please HELP!!!!
this is on a 1998 chevy k1500 silerado with the 5.7l extended cab, please help asap

 

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