2010 Chevrolet Suburban 2500 Owner's Manual - Page 220

The sunroof has a comfort stop feature which stops the sunroof from opening to the full-open position. From the comfort stop position, press the rear of the driver's side switch a second time to open the sunroof to the full-open position. When the sunroof is opened, an air deflector will automatically raise. The air deflector will retract when the sunroof is closed. Vent: The sunroof has an express-vent open feature. From the closed position, press the rear of the passenger's side switch to vent the sunroof. To stop the sunroof partway, press the switch a second time. To close the sunroof, press and hold the front of the passenger's side switch. To stop the sunroof partway, release the switch. Anti-Pinch Feature: If an object is in the path of the sunroof while it is closing, the anti-pinch feature will detect the object and stop the sunroof from closing at the point of the obstruction. The sunroof will then open halfway, and the air deflector will raise. To close the sunroof once it has re-opened, refer to the "Express-Close" or "Manual-Close" functions described previously. If the sunroof is in the vent position, and there is an object in the path of the sunroof when it closing, the anti-pinch feature will detect the object and stop the sunroof. To close the sunroof once it has re-opened, refer to the "Manual-Close" or "Express-Close" functions described previously. Dirt and debris may collect on the sunroof seal or in the tracks that could cause an issue with sunroof operation, noise or plug the water drainage system. Periodically open the sunroof and remove any obstacles or loose debris. Wipe the sunroof seal and roof sealing area using a clean cloth, mild soap, and water. Do not remove grease from sunroof. 3-80