Help please, I have a 2001 silverado 1500. It has the factory 6 wire harness on it. (Someone cutoff the connector.) I'm trying to wire the 7 way connector for my travel trailer and I need the know which wires go where. I have the brake controller & the adapter for under the dash. Thanks.

 

Welcome to the forum..
A forum search should turn up lots of info on the harness and its configuration
here is a link to a quick search I did...
https://chevroletforum.com/forum/sea...earchid=724725

 

give this link a try, it has a picture of what you might be looking for....

https://chevroletforum.com/forum/sho...trailer+wiring