Help find part number for trailer harness

[pavetim]

2015 3500HD, high country duramax. Cannot seem to locate correct part but u need the trailer harness that runs on top of the frame amd goes to the plugs. Not the one that goes all the way up front rim, the one that go right to the bumper plug and bed plug

 

[Ron Nielson]

'Get your vin# and go to a GM-based parts lookup web site and find the part you need. Once you have the part number, you can shop for price, delivery time, etc.

 

[pavetim]

Well yet another trailer brake issue, man i wish gm would fix this shit. Replaced the harness that goes to my 7 way plugs, didn't fix it, replaced electronic trailer brake module didn't fix it, found blown 30a fuse for trailer brakes didnt fix it. Just ordered the trailer brake controller on the dash so hope that fixes it cause i have a trip coming up