I think I have most what I need at this point. The 91 sub is a v2500 suburban square body and the 92 was a gmc k2500 extra cab long bed. I found the suburban wiring diagrams on the 73-87chevytruck.com site. Very helpful info over there for diagrams. I have found and am using a 91 c/k truck wiring diagram as stated by "myburb" and it seems to be really close. I haven't gotten all the way in to the harness on the 92 BBC yet to confirm it is exactly what right. Hopefully will get there this evening.