Cadillac 2013 ATS Owner's Manual page 374

Use the following procedure to dolly
tow a rear-wheel-drive vehicle from
the rear:
1. Attach the dolly to the tow
vehicle following the dolly
manufacturer's instructions.
2. Put the rear wheels on the dolly.
3. Firmly set the parking brake.
See
or
4. Put the vehicle in P (Park) for an
automatic transmission or in
1 (First) for a manual
transmission.
5. Securely attach the vehicle
being towed to the dolly.
6. Clamp the steering wheel in a
straight-ahead position with a
clamping device designed for
towing.
7. Turn the ignition to LOCK/OFF.
.
All-wheel-drive vehicles can only be
towed with all four wheels on a
trailer.