non monsoon shouldnt be to different on the install compared to the non-monsoon. Except for wire coloring.
First, Id double check the wires the installer did from the OS4 module to the wiring harnes of the D1.
second, make sure the two purple wires as shown on this picture at spliced together. If this isnt done your on-star will not work. Just use any wire to tap the two purple wires together.
