The trailer is still with La Mesa RV. On the GM web sites I am seeing a lot of complaints for new truck 7 Pin Connector issues. Some say dielectric grease on the contacts, some say better ground and some say don't plug in the connector with the truck running. If I use that break controller you suggested how will that impact the current Silverado system. The trailer mode turns on the cameras on the mirrors for lane changes. I am told that the break controller pulses the break lines looking for a connection. Seems like this is a big GM Issue that they are ignoring on a *******. 00 truck.