2010 GMC Acadia Owner's Manual - Page 42

2-12 Keys, Doors and Windows close cycle. After removing the obstruction, the power liftgate operation can be used again. If the liftgate comes across more obstacles on the same power cycle, the power function deactivates, and you must manually open or close the liftgate. A message displays, LIFTGATE OPEN, to indicate that the liftgate is open. See Driver Information Center (DIC) (With DIC Buttons) on page 5‑24 or Driver Information Center (DIC) (Without DIC Buttons) on page 5‑29 for more information. After removing the obstructions, manually open the liftgate to the full open position or close the liftgate to the fully closed and latched position. The liftgate resumes normal power operation. Pinch sensors are located on the side edges of the liftgate. If an object is caught between the liftgate and the vehicle and presses against this sensor, the liftgate will reverse direction and open fully. The liftgate will remain open until it is activated again or closed manually. Do not force the liftgate open or closed during a power cycle. If the vehicle is shifted out of P (Park) while the power function is in progress, the liftgate power function will continue to completion. If the vehicle is shifted out of P (Park) and the vehicle accelerates before the power liftgate latches closed, the liftgate may reverse to the open position. Cargo could fall out of the vehicle. The power liftgate must be closed and latched before driving. If the liftgate is power opened and the support struts have lost pressure, the lights will flash and a chime will sound. The liftgate will stay open temporarily, then slowly close. See your dealer/retailer for service before using the liftgate if this occurs. Obstacle Detection Features A warning chime will sound and the liftgate will automatically reverse direction to the full closed or open position if the liftgate encounters an obstacle during a power open or Manual Operation of Power Liftgate To change the liftgate to manual operation, press the switch on the center console to OFF. With the power liftgate disabled and all of the doors unlocked, the liftgate can be manually opened and closed.