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Ok, I will tell you what it is for, but I have to warn you that I have also taken your pic as an example.
Check this thread out. Trailer wiring for your van
James from B.C.
1992 Safari - R.I.P.
GM Grand Master Techncian
no problem as long as i could help it has been bugging me for a while and just got around to taking the pic.but where exactly does it go in the controler thing...
99 sle awd safari
Another addition to cash for clunkers.