Cadillac 1996 DeVille Owner's Manual page 233

A
CAUTION:
A vehicle can fall from a car carrier if it isn't
adequately secured. This can cause a collision,
serious personal injury and vehicle damage. The
vehicle should be tightly secured with chains or
steel cables before it is transported.
Don't use substitutes (ropes, leather straps,
canvas webbing, etc.) that can be cut by sharp
edges underneath the towed vehicle. Always use
T-hooks inserted in the front T-hook
slots or
R-hooks inserted in the rear R-hook slots. Never
use
J-hooks.
They will damage drivetrain
and
suspension components.
When
your vehicle
is
being towed,
have
the ignition key
turned to the
OFF
position. The steering wheel should
be clamped in
a
straight-ahead position, with
a
clamping
device designed for towing service. Do not use the
vehicle's steering column lock for this. The transaxle
should be in NEUTRAL (N) and the parking brake
released.
Don't have your vehicle towed on the drive wheels
unless you must. If the vehicle must be towed on the
drive wheels, be sure to follow the speed and distance
restrictions later in this section or your transaxle will be
damaged. If these limitations must be exceeded, then the
drive wheels have to be supported on a dolly.