2005 Chevrolet Impala Owner's Manual - Page 119

The sunroof can only be operated when the ignition is in ACCESSORY, RUN, or when Retained Accessory Power (RAP) is active. See Retained Accessory Power (RAP) on page 2-22. To vent the sunroof when it is closed, press this switch once. When using the vent, the sunshade should be fully opened. The sunshade can be opened or closed manually by sliding it rearward or forward. From the vent position, press this switch again to activate the express-open feature. Press the close switch to stop movement of the sunroof. The sunshade will automatically open when using express-open. A deflector will automatically pop up when the sunroof is opened. The deflector will retract when the sunroof is closed. Q (Vent/Express-Open): R (Close): To close the sunroof, press and hold this switch until the sunroof motor stops, or release the switch when the desired position has been reached. 2-43