I have a problem with my cars engine harness at fuse box under hood!! Battery acid leaked on to wire harness and started eating away wires I have been replacing them one by one, wanted to know if I could just buy a harness and what is compatible with my car? I have a 2001 grand prix gt with sunroof/onstar and HUD. I don't know if I need a certain wire harness or will just anyone off a old gp will work? just need advise thx