On the V6 Model- The low-side recharge port is near the firewall (passenger compartment) just beyond and below the alternator. You should see a blue cap sticking up. You'll have to reach around and under the alternator to get to it. *Warning* Do not attempt while engine is running.
The 1999 Oldsmobile Alero does not have Freon in the A/C system. It contains R134 and not Freon which is R12. As I am sure you do not have the proper equipment to recharge the system plus the fact it is illegal to add refrigerant to a system with a leak, until the leak is repaired, take it to a professional and have the leak repaired. You have a leak or you would not need to add refrigerant.
In the low side ac service port.
Where_do_you_add_freon_on_a_2000_buick_regal
Go to Walmart or an auto parts store. Buy an a/c recharge kit for R134 freon coolent. Follow the directions on the can..
It contains no Freon. It contains R134a refrigerant and you add it to the low pressure port which is the larger pipe.
FreonThe connection is on or close to the receiver dryer. If you add too much, the compressor will lock up or it won't cool very good. They don't sell Freon any longer. By the way, your car takes R134A refrigerant. If you add Freon, you ruin it.
Low pressure line Larger line running from compressor
Freon is added into the low side ac port. Using the proper type Freon, and a gauge that works with that type Freon, connect the hose to the port. With the engine running allow the Freon to flow until the gauge reads in the ok range.
There is no transmission dipstick. They have a sealed transaxle. You should never have to add or replace fluid.
The 2000 Chevrolet Silverado truck has two ports on top of the air conditioner compressor. You will add Freon through the low pressure port.
On the suction side, the low side...................
There is one valve that is used to add refrigrant. But you had better not add Freon. Freon is R12 and your vehicle's A/C system does not have Freon (R12) as a refrigrant. More than likely it uses R134a.