2008 GMC Acadia Owner's Manual - Page 98

If you shift the transmission out of PARK (P) while the power function is in progress, the liftgate power function will continue to completion. If you shift the transmission out of PARK (P) and accelerate before the power liftgate latches closed, the liftgate may reverse to the open position. Cargo could fall out of the vehicle. Always make sure the power liftgate is closed and latched before you drive away. If you power open the liftgate and the liftgate 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. Power Liftgate Button Near Liftgate Latch The liftgate can also be closed by pressing the power liftgate button next to the liftgate latch. Press the button a second time during liftgate operation to reverse that operation. The power liftgate may be temporarily disabled under extreme temperatures, or under low battery conditions. If this occurs, the liftgate can still be operated manually. Obstacle Detection Features If the liftgate encounters an obstacle during a power open or close cycle, a warning chime will sound and the liftgate will automatically reverse direction to the full closed or open position. After removing the obstruction, the power liftgate operation can be used again. If the liftgate encounters multiple obstacles on the same power cycle, the power function will deactivate, and you must manually open or close the liftgate. The LIFTGATE OPEN warning message in the Driver Information Center (DIC) will indicate that the liftgate is open. 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 will now resume normal power operation. 2-16