Eugene Scarbrough, The service valve is behind the wheel well cover on the front passenger side. Take a look on here for service and refill instructions. "the A/C system is under high pressure. Also, while R134a isn't as bad for the environment as the older R12, there is still a heavy fine for venting R134a into the atmosphere. You should never take apart your A/C system without proper training and refrigerant recovery equipment. Wear protective glasses at all times while servicing your A/C. Also, you will be working under or near the car while it is running. Hope this helps, good luck.