2007 wiring question

[Roy Goodwin]

I have a 2007 flex fuel 5.3 yukon, been having problems with it throwing some codes, loosing grounds etc. I was checking everything over and noticed a red and black wire bundled up and taped to the loom. I attached some pics. Can’t figure out where it would go or what it’s for. Just looking for some help, thanks

 

[Doubeleive]

I have a 2007 flex fuel 5.3 yukon, been having problems with it throwing some codes, loosing grounds etc. I was checking everything over and noticed a red and black wire bundled up and taped to the loom. I attached some pics. Can’t figure out where it would go or what it’s for. Just looking for some help, thanks

View attachment 224317 View attachment 224318

the red wire on the main harness is for power to the trailer connector on the back of the truck, there is another red wire between the fuse box and the fender for a brake controller, they both connect to the studs on the front of the fuse box whenever needed.
there are left disconnected when assembled at the factory.

 

[swathdiver]

^^^^ What Wes said! ^^^^ Those are towing related. They are not active until hooked up and one gets a fuse.