1995 GMC Yukon Owner's Manual - Page 279

If You're Stuck: In Sand, Mud,Ice or Snow What you don't want to do when your vehicle is stuck is to spin your wheels too fast. The method known "rocking" canhelp you get out when you're as stuck, butyou must use caution. NOTICE: Spinning your wheels can destroy parts of your vehicle as as well the tires.If you spin the wheels too while shifting your fast transmission back and forth, you can destroy your transmission. For information about using tire chains your vehicle, see on "Tire Chains" in the Index. Rocking your vehicle to get it out: First, turn your steeringwheel left and right. Thatwill clear the area around your front wheels. Then shiftback and forth between REVERSE and a (R) forward gear(or with a manualtransmission, between F'IRST (1) or SECOND (2) gear and REVERSE), spinning the wheels as little as possible. Release the accelerator pedal while shift, and press lightly on the you accelerator pedalwhen the transmission is ingear. If that doesn't get you out after a few tries, may need to be towed out.Or, you can use your you recovery hooks,if your vehiclehas them. If you do need to towed out, be see "Towing Your Vehicle" in the Index. 5-41