Low refrigerant is often a symptom of a larger problem, such as a leak in the system. Simply adding Freon without finding and fixing the leak will just result in having to add more Freon repeatedly.
Instead of trying to add Freon yourself, take your 2000 Chevy Malibu to a qualified mechanic or an automotive air conditioning specialist. They have the proper equipment to:
* Identify the leak: They'll use specialized tools to locate any leaks in the system.
* Repair the leak: Once the leak is found, they can repair it.
* Evacuate and recharge the system: They'll remove the old refrigerant, vacuum the system to remove any air and moisture, and then add the correct amount of refrigerant and oil.
Attempting to handle this yourself could lead to injury from handling refrigerants or significant additional repair costs from damaging the AC system. Professional service is the safest and most cost-effective solution in the long run.