Where Does Curt Trailer Wiring Harness Install on a 2005 Buick Terraza

Trailer Brake Lights Go Out When Stepping on Brakes in a 2007 Buick Terraza

Traction Control Fault and No Trailer Brakes with Brake Controller Installed in 2005 Buick Terraza

Is Installation of TowReady T-One Wiring Harness Similar on 2005 and 2006 Buick Terraza