The GMC Sierra full-size pickup was made for hauling; if you own one, chances are strong that at some point, you’ll be barreling through the countryside with a boat, a camper, or some other trailered cargo secured to the back end. In this video from GMC, we’re shown the basic steps of setting up the electronic brake controller for any wheeled payload.
Large, modern trailers most often have electric braking systems to decelerate the towed payload as the towing vehicle is decelerated. This typically used to mean installing a separate electric brake controller somewhere in the truck’s cabin to control the force applied to the trailer wheels, but with the GMC Sierra, the electric trailer brake receptacle and controller can be integrated.
Setting up a trailer to respond to the truck’s braking is a simple matter of adjusting the electrical gain, which is essentially a multiplier for the truck’s deceleration; the more you apply the brakes in the truck, the more the trailer’s brakes apply. But the factor by which the trailers brakes engage relative to those of the GMC Sierra must be appropriate, lest the wheels provide either to little braking, or too much (resulting in lock-up).
Watch the video below for a demonstration of how to adjust the GMC Sierra’s mighty electric trailer brake controller: