Cadillac 2012 CTS Owner's Manual page 422

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.
To preserve the vehicle's finish,
wash it often and out of direct
sunlight.