Heated OSRV Mirror
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
On vehicles equipped with heated outside rearview (OSRV) mirrors, the driver door switch (DDS) and passenger door switch (PDS) controls the activation of the mirror heaters. Upon receiving a LAN message indicating a request for heated mirrors, the driver door switch (DDS), and passenger door switch (PDS) for the passenger side, will activate the mirror heater output. The mirror heaters will remain active until a new message is received indicating rear defogger is to be deactivated, either by driver input or by expiration of a calibrated timer.