Cadillac 2008 SRX Owner's Manual page 92

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 hold open temporarily,
then slowly close. See your dealer for service before
using the liftgate.
2-14
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 fully
closed or open position. After removing the obstruction,
the liftgate may be power opened or closed normally.
If the liftgate encounters multiple obstacles on the
same power cycle, the power function will deactivate,
and the liftgate will switch to manual operation.
The REAR ACCESS 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 fully open position or
close the liftgate to the fully closed and latched position.
The liftgate will now resume normal power operation.
Your vehicle has an obstacle detection sensor located
on the rear edge of the rear quarter panel windows. If an
object is caught between the liftgate and the window
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.