What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[Doubeleive]

Does anyone know if a brake controller has to have a trailer plugged into the rear of the vehicle in order to turn on? I have this Draw-Tite 2 in this truck but all I get is a single red dot if I push the manual slide to the left. No percentage in the display like I see online.

doesn't do anything if there is no trailer connected as far I remember I had a similar one in my 03

 

[Grady_Wilson]

I do believe the controller needs to see the trailer brake circuit in order to be activated.