GMC Chevy Colorado 2023 Manual page 50

2-36 Mirrors
unfold depending on their current state. The BCM will
also send a serial data message to unfold the mirrors
when the vehicle reaches 20 km/h (12 mph). The
S79 Front Side Door Window Control Switches control
the fold/unfold motors through bi-directional control
circuits
Heated Mirrors
The heated mirrors are controlled through each
S79 Front Side Door Window Control Switch. When the
vehicle is running and the HVAC control module
receives a rear window defog request from the radio/
HVAC controls, the HVAC control module will send a
serial data message to the S79D Driver Front Side
Door Window Control Switch and S79P Passenger
Front Side Door Window Control Switch. Each
S79 Front Side Door Window Control Switch provide B
+ voltage to the driver and passenger outside rearview
mirror heating elements.
2023 - Colorado Electrical Body Builder Manual