Buick 2003 LeSabre Owner's Manual page 238

Notice: Spinning your wheels can destroy parts
of your vehicle as well as the tires. If you spin the
wheels too fast while shifting your transaxle
back and forth, you can destroy your transaxle.
See "Rocking Your Vehicle To Get It Out."
For information about using tire chains on your vehicle,
see Tire Chains on
page
5-70.
Rocking Your Vehicle To Get It Out
First, turn your steering wheel left and right. That will
clear the area around your front wheels. If your vehicle
has traction control, you should turn the system off.
See Traction Control System (TCS) on page 4-9.
Then shift back and forth between REVERSE (R) and a
forward gear, spinning the wheels as little as possible.
Release the accelerator pedal while you shift, and press
lightly on the accelerator pedal when the transaxle is
in gear. By slowly spinning your wheels in the forward
and reverse directions, you will cause a rocking
motion that may free your vehicle. If that doesn't get
you out after a few tries, you may need to be towed out.
If you do need to be towed out, see "Towing Your
Vehicle" following.
4-31