Where do you add refrigerant in a 1999 Chevy Malibu?

The refrigerant charging port on a 1999 Chevy Malibu's air conditioning system is usually located on the low-pressure side of the system. It's typically a low-side service port with a Schrader valve (looks like a tire valve). It's often found near the compressor, condenser, or drier, but its exact location can vary slightly depending on the specific model and configuration.

To find it, look for:

* A metal fitting with a cap: This cap usually has a valve core (like a tire valve) that you can press down to access the port. This is the most reliable way to locate it.

* A label or tag near the A/C components: The service ports might be identified with labels or tags.

* A low-pressure hose: The low-pressure service port is connected to a low-pressure hose, which is usually thinner than the high-pressure hose.

Important Considerations:

* Do not attempt to add refrigerant yourself unless you are experienced with automotive A/C systems. Improperly adding refrigerant can damage the system and potentially harm you. Refrigerant is also under high pressure and can cause serious injury.

* Get your A/C system professionally diagnosed. A leak or other issue might be the reason your A/C isn't working. Simply adding refrigerant won't fix underlying problems. A mechanic can properly identify the problem, repair any leaks, and add the correct amount of refrigerant.

* Refrigerant needs to be added using proper equipment. You'll need gauges and a vacuum pump to properly evacuate the system and charge it with the correct amount and type of refrigerant.

It's strongly recommended that you take your 1999 Chevy Malibu to a qualified mechanic for any air conditioning service, rather than trying to do it yourself.