1998 GMC Safari Owner's Manual - Page 259

If You're Stuck: In Sand, Mud, Ice or Snow What you don't want dowhen your vehicleis stuck is to to spin your wheelstoo fast. The method known as "rocking" can help you get out when you're stuck, but you must use caution. NOTICE: Spinning yourwheels can destroyparts of your vehicle as well as thetires. If you spin thewheels too fast while shifting your transmission back and forth,you can destroy your transmission. For information about using tire chains on your vehicle see "Tire Chains"in the Index. If you let your tires spin high speed,they can at explode, and you or otherscould be injured. And, the transmissionor other parts the vehicle can of overheat. That could causean engine compartment fireor other damage. When you're possible. Don't stuck, spin the wheels as little as spin thewheels above 35 mph (55 km/h) as shown on the speedometer. Rocking Your Vehicle To Get It Out First, turn your steering wheel left and right. That will clear the area around your front wheels. Then shift bac and forth betweenREVERSE (R) and a forward gear, spinning the wheels little as possible. Release the as accelerator pedal while you shift, and press lightly on the accelerator pedal when the transmission in gear. I is f that doesn't get you out after a few tries, you may need to be towedout. If you do need to be towed out, see "Towing Your Vehicle" in the Index. 5-37