Buick Regal 2014 Owner's Manual page 332

2. Shift the transmission into
1 (First) gear and turn the
engine off.
3. Set the parking brake.
4. Following the manufacturer's
instructions, attach the vehicle
being towed to the tow vehicle.
5. Shift the transmission to Neutral.
6. Release the parking brake.
When towing the vehicle for
extended periods of time, start the
vehicle as often as possible to
prevent battery drain. This should
be done when the tow vehicle is
parked.
The vehicle was not designed to be
towed from the rear with all four
wheels on the ground.
Vehicles with front-wheel drive can
be dolly towed from the front.
Use the following procedure to dolly
tow the vehicle from the front:
1. Attach the dolly to the tow
vehicle following the dolly
manufacturer's instructions.
2. Drive the front wheels onto the
dolly.