1996 Oldsmobile Silhouette Owner's Manual - Page 246

Rocking your vehicle to get it out: NOTICE: Spinning your wheels can destroy parts of your If vehicle as well as the tires. you spin the wheels too fast while shifting your transaxle back and forth, you can destroy your transaxle. For information about using tire chains on your vehicle, see "Tire Chains" in the Index. First, turn your steering wheel left and right. That will clear the area around your front wheels. 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. 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" in the Index.