GM Service Manual Online
For 1990-2009 cars only

First, turn the steering wheel left and right to clear the area around the front wheels. Turn off any traction or stability system. See Traction Control System (TCS) and Electronic Stability Control (ESC) . Then shift back and forth between REVERSE (R) and a forward gear, spinning the wheels as little as possible. To prevent transmission wear, wait until the wheels stop spinning before shifting gears. Release the accelerator pedal while you shift, and press lightly on the accelerator pedal when the transmission is in gear. By slowly spinning the wheels in the forward and reverse directions, you will cause a rocking motion that could free your vehicle. If that does not get your vehicle out after a few tries, it might need to be towed out. If your vehicle does need to be towed out, see Towing Your Vehicle .