Needing some help here. Recently purchased this Big Horn, and want to access Sirius XM with the factory head unit. The truck has the satellite type antenna on the roof, and settings on the unit for satellite radio. Talked to Sirius and gave them the sixteen digit code in the radio. It still won’t connect, and we were told that there should be a control module for this. Looked under passenger rear seat and behind glove box with no success nor any wiring harness that is unplugged. We’ve already tried the refresh codes given to us by Sirius, several times. Any advice/ suggestions? We feel that someone has possibly removed this module, prior to us buying the truck. Where should it be located? We have looked in the obvious locations and found no unplugged harnesses, nor any cut wires.