Im working on a Telluride that was hit in the rear end...bumper,bumper cover and one of the blind spot sensors has been replaced by a bodyshop...i only have 1 code C181887 Can time-out BCA...i figured i would try to recalibrate the BS system but im unable to communicate with the system....does anyone know where about i should look..all the wires in the rear bumper area appear to be not damaged!