I recently installed a Pioneer headunit in my 2010 Traverse (non-Bose) using the GMOS-LAN-01 Data Bus Interface. The installation went fine and everything works like it should except that I have no audbile turn signal indicator. The Crutchfileld people shipped a simple SPDT relay with instructions to connect pin 86 to the constant 12V wire and pin 85 to the black/white wire in the 12-pin harness. I did that, but it doesn't work. The idea seems to be that the relay coil would be energized at intervals causing the relay to click and restoring the clicking sound. For whatever reason, that strategy doesn't work. Crutchfield's solution was to credit me with the cost of the relay. I checked the relay and it is fine. Does anyone know how to make this work or of some othe way to get an audible turn signal indication?