2003 Buick Rendezvous Owner's Manual - Page 142

Sunroof If your vehicle has a sunroof, the switch is located between the sun visors. Notice: Do not open the sunroof if the luggage carrier crossrails are not in the full rear position. This could cause damage to the sunroof glass panel and/or the crossrails. See "Roof Rack System" in the Index for more information. When vent opening the sunroof, the sunshade must be opened by hand. Press the rear of the switch to vent open the glass panel. Press the rear of the switch a second time and release it to express-open the glass panel. The glass panel and sunshade will fully open. When the glass panel is express opening, pressing the switch in either direction will stop it. If you press and hold the rear of the switch, the express-open operation will be overridden. The sunroof switch will only work when the ignition is on or when the ignition is off and retained accessory power is active. See "Retained Accessory Power" under lgnition Positions on page 2-20 for more information. To close the glass panel, press and hold the front of the switch until the glass panel stops. 2-49