1995 GMC Sonoma Owner's Manual - Page 216

3. Put the chisel end of the wheel wrench, on an angle, through the hole in the rear bumper and into the hoist shaft. Turn the wheel wrench clockwise until the tire is raised against the underside of the vehicle. You will hear two "clicks" when the tire is secure, but pull on the tire to make sure. I NOTICE: Don't use the existing hoist to store a tire with an aluminum wheel or it could damage the wheel. Secure the tire in the pickup bed. 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 as "rocking" can help you get out when you're stuck, but you must use caution. 5-32