Videos of 2008 gmc sierra trailer brake wiring Click to view on YouTube5:43Installation of a Trailer Brake Controller on a 2008 GMC Yukon - etrailer2 viewsYouTube · 10/4/2012Click to view on YouTube1:39Installation of the Pollak Twist-In Trailer Connector on a 2009 GMC Sierra 1500 - etrailer296 viewsYouTube · 1/22/2015Click to view on YouTube3:15Fifth Wheel and Gooseneck Wiring Harness Installation - 2011 GMC Sierra - etrailer357 viewsYouTube · Click to view on YouTube3:18Brake Control Wiring Install: CURT 51515 for 2008-2012 Chevrolet Silverado17K viewsYouTube · 5/2/2012Click to view on YouTube3:21CIPA Custom Towing Mirrors Installation - 2008 GMC Sierra - etrailer305 viewsYouTube · Click to view on YouTube4:45Trailer Hitch Installation - 2007 GMC Sierra Classic - Curt - etrailer700 viewsYouTube · 8/26/2016See more videos of 2008 gmc sierra trailer brake wiring Trailer Brake Controller Installation 2008 GMC Sierra Click to view4:51May 29, 2008A brake controller installed on a 2008 GMC Sierra. along with part number 20047. The 7-way replacement socket for the GM products and the 20127 replacement brake control plug-in harness. VideosAuthor: etrailerViews: 98K I have a 2008 GMC Sierra and am wiring a trailer brake I have a 2008 GMC Sierra and am wiring a trailer brake controller. I found the wire bundle for the controller and wired this to the controller and it didn''t work. I checked for voltage on the grd and power wire and get nothing. Is there a fuse or something that I need to do to get power??