Buick 2011 Regal Owner's Manual page 335

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.
3. Shift the automatic transmission
into P (Park) or a manual
transmission into 1 (First) gear.
4. Firmly set the parking brake.
5. Use an adequate clamping
device designed for towing to
ensure that the front wheels are
locked into the straight-ahead
position.
6. Secure the vehicle to the dolly
following the manufacturer's
instructions.
7. Release the parking brake only
after the vehicle being towed is
firmly attached to the towing
vehicle.
8. Turn the ignition to LOCK/OFF.