Speaker 1: Today on our 2015 GMC Sierra 1500, we're going to be taking a look at and showing you how to install the Reese Quick-Install Custom Base Rails and Outboard Installation Kit for 5th Wheel Trailer Hitches, part number RP56007-53.This is what our rails look like when they're installed. This is going to be your mounting location for most standard fifth wheels. Now, these are going… see more >