Buick Regal Owners & Service Manuals

Buick Regal: Power Liftgate Operation

Warning: Exhaust gases can enter the vehicle if it is driven with the liftgate, trunk/hatch open, or with any objects that pass through the seal between the body and the trunk/hatch or liftgate. Engine exhaust contains carbon monoxide (CO) which cannot be seen or smelled. It can cause unconsciousness and even death.

If the vehicle must be driven with the liftgate, or trunk/hatch open:

  • Close all of the windows.
  • Fully open the air outlets on or under the instrument panel.
  • Adjust the climate control system to a setting that brings in only outside air and set the fan speed to the highest setting. See "Climate Control Systems" in the Index.
  • If the vehicle has a power liftgate, disable the power liftgate function.

Caution: Driving with an open and unsecured liftgate may result in damage to the power liftgate components.

Caution: Manually forcing the liftgate to open or close during a power cycle can damage the vehicle.

Allow the power cycle to complete.

If equipped, the power liftgate can be operated by:

  • on the inside of thebon the RKE transmitter.
  • driver door.on the inside of the driver door.
  • The touch pad under the emblem.

Station Wagon Shown, Hatchback Station Wagon Shown, Hatchback Similar

  • under the open liftgate.

If equipped with a power liftgate, the

If equipped with a power liftgate, the switch is on the driver door. The vehicle must be in P (Park).

The modes are:

  • MAX: Opens to maximum height.
  • 3/4: Opens to a reduced height that can be set from 3/4 to fully open. Use to prevent the liftgate from opening into overhead obstructions such as a garage door or roof-mounted cargo. The liftgate can be manually opened all the way.
  • OFF: Opens manually only.

To power open or close the liftgate, select MAX or 3/4 mode.

  • Press transmitter. twice on the RKE transmitter.
  • Press The driver door must either be on the driver door.

    The driver door must either be unlocked or locked without the security armed.

  • Press the touch pad switch under the emblem.
  • Press on the open liftgate.

Press any liftgate switch while the liftgate is moving to reverse the direction.

The power liftgate may be temporarily disabled under extreme low temperatures, or after repeated power cycling over a short period of time. If this occurs, the liftgate can still be operated manually.

If the vehicle is shifted out of P (Park) while the power function is in progress, the liftgate will continue to completion. If the vehicle is accelerated before the liftgate has completed moving, the liftgate may stop or reverse direction. Check for DIC messages and make sure the liftgate is closed and latched before driving.

Falling Liftgate Detection

If the power liftgate automatically closes after a power opening cycle, it indicates that the system is reacting to excess weight on the liftgate or a possible support strut failure. A repetitive chime will sound while the falling liftgate detection feature is operating. Remove any excess weight. If the liftgate continues to automatically close after opening, see your dealer for service before using the power liftgate.

Interfering with the power liftgate motion or manually closing the liftgate too quickly after power opening may resemble a support strut failure. This could also activate the falling liftgate detection feature.

Allow the liftgate to complete its operation and wait a few seconds before manually closing the liftgate.

Obstacle Detection Features

If the liftgate encounters an obstacle during a power open or close cycle, the liftgate will automatically reverse direction and move a short distance away from the obstacle. After removing the obstruction, the power liftgate can be used again. If the liftgate encounters multiple obstacles on the same power cycle, the power function will deactivate.

After removing the obstructions, manually close the liftgate. This will allow normal power operation functions to resume.

If the vehicle is locked while the liftgate is closing, and an obstacle is encountered that prevents the liftgate from completely closing, the horn will sound as an alert that the liftgate did not close.

Pinch sensors are on the side edges of the liftgate. If an object is caught between the liftgate and the vehicle and presses against a sensor, the liftgate will reverse direction and open fully. The liftgate will remain open until it is activated again or closed manually.

Setting the 3/4 Mode

To change the position the liftgate stops at when opening:

1. Select MAX or 3/4 mode and power open the liftgate.

2. Stop the liftgate movement at the desired height by pressing any liftgate switch. Manually adjust the liftgate position if needed.

3. Press and hold open liftgate until the turn under the open liftgate until the turn signals flash and a beep sounds. This indicates the setting has been recorded.

The liftgate cannot be set below a minimum programmable height.

If there is no light flash or sound, then the height adjustment may be too low.

Manual Operation

Select OFF to manually operate the liftgate. See "Manual Liftgate" at the beginning of this section.

Caution: Attempting to move the liftgate too quickly and with excessive force may result in damage to the vehicle.

Operate the liftgate manually with a smooth motion and moderate speed. The system includes a feature that limits the manual closing speed to protect the components.


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