Roof Express Open Operation
WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
The roof express or vent express features allow for movement of the roof glass to the fully open positions in unsupervised modes. When the roof or vent open switch is momentarily pressed rearward to the second detente, the roof/vent open and roof/vent express signal circuits are simultaneously pulled low through the switch contacts signaling the sunroof control module of the roof/vent express open request. The module then commands the motor to move the roof glass to the requested full open position. To stop the roof in a desired position other than the full open position, momentarily press the sunroof switch in either direction to stop the movement.