Brake Controller Wiring for 2007 GMC Sierra New Body

Question:

installing a draw-tite I-command brake controller. following the installation instructions on your site. going well but I dont know whether to hook the light blue wire labeled CHMSL or orange wire labeled CHMS to the pigtail. dont know what that stands for.

asked by: John B

Expert Reply:

When installing the Brake EVN # TK63VR to your 2007 GMC Sierra New Body with the factory tow package, you can attach the red wire of the Brake Control Plug-In Harness # 20127 to either the light blue wire or the orange wire, which are brake light wires (CHMSL stands for Center High Mounted Stop Light).

I have added a link to a help article on installing a brake controller on your generation of Sierra which I strongly recommend reading.

expert reply by: Kyle S