Here's why you should leave it to a professional:
* Refrigerant Handling: Refrigerants are under high pressure and can cause serious burns or frostbite if mishandled. They are also harmful to the environment if released improperly.
* System Diagnosis: Low freon is a symptom, not the cause. A leak in the system needs to be identified and repaired *before* adding any refrigerant. Adding freon to a system with a leak is a waste of money and harmful to the environment.
* Specialized Equipment: Properly charging an AC system requires specialized tools and gauges to measure pressure and ensure the correct amount of refrigerant is added.
* Safety Precautions: Working with refrigerants requires understanding safety protocols and wearing appropriate personal protective equipment (PPE).
Instead of attempting this yourself, take your 2002 Chevy Tracker to a qualified automotive repair shop or an air conditioning specialist. They have the expertise, tools, and equipment to diagnose the problem accurately and safely recharge your system. They can identify any leaks and repair them before adding the correct amount and type of refrigerant. This will save you money in the long run and ensure your safety.