To change a tire, follow these steps: 1. Find a safe location and turn on your hazard lights. 2. Use a wrench to loosen the lug nuts slightly. 3. Place a jack under the vehicle and lift it until the tire is off the ground. 4. Remove the lug nuts completely and take off the flat tire. 5. Place the spare tire onto the hub and hand-tighten the lug nuts. 6. Lower the vehicle and tighten the lug nuts with the wrench. 7. Ensure all lug nuts are secure before driving.