2001 GMC Brake Controller | etrailer How to Wire Tekonsha Voyager Brake Controller # 5100 in 2001 GMC Yukon; On the 2001 GMC Yukon there is a brake controller wiring harness tucked up under the dash to the left of the steering wheel that you will connect to your brake controller's 4-wire harness. Only 4 wires will connect to the brake controller. 2001 GMC Sierra Brake Controller | etrailer Lowest Price Brake Controller Guarantee. Installation instructions and lifetime expert support on all purchases of 2001 GMC Sierra Brake Controller. Order online at etrailer or call 800-298-8924.