Here's why and what you should do instead:
* Refrigerant Type: Identifying the correct refrigerant type (R-12 or R-134a) is crucial. Improper refrigerant can damage the system. The 1999 Malibu likely uses R-134a, but you *must* verify this before doing anything.
* Pressure and Vacuum: A proper recharge requires checking system pressures and creating a vacuum to remove air and moisture before adding refrigerant. This needs specific gauges and a vacuum pump.
* Leaks: Adding refrigerant to a leaking system is a waste of money and harmful to the environment. You need to locate and repair any leaks *before* recharging. This often requires specialized leak detection equipment.
* Safety: Refrigerant is under high pressure and can cause serious injury if handled incorrectly.
Instead of attempting a DIY recharge, you should:
1. Take it to a qualified mechanic or AC specialist: This is the safest and most reliable method. They have the tools, knowledge, and experience to diagnose the problem, repair any leaks, and properly recharge the system.
2. Have them diagnose the problem: Low refrigerant might be a symptom of a larger issue, such as a compressor failure, condenser leak, or expansion valve problem. A mechanic can identify the root cause and provide an accurate repair quote.
Attempting to recharge your AC yourself without the proper knowledge and equipment is risky and likely to cost you more in the long run. Professional help is the best option for a safe and effective repair.
