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It contains no Freon. It contains R134a refrigerant and you add it to the low pressure port which is the larger pipe.
The high/low pressure lines have valves (1 each) like a tire. You plug a can into each side to recharge. the can will have the fitting and a guage.
I had an additive put in my Lincoln ls. I bought the adapter needed to add freon. It was located on driver side in front of tire.
Where_do_you_add_freon_on_a_2000_buick_regal
You add refrigerant at the low pressure port but you do not add Freon. You add R134/134a. If you are having to add refrigerant then you have a leak that needs to be repaired first.
It contains no Freon. It contains R134a refrigerant and you add it to the low pressure port which is the larger pipe.
Connect guage & 134a freon to low pressure on the evaporator add 1lb at a time
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.
It is either on or near the recievr dryer in the right rear of the engine compartment. To corrrectly add freon, you need gauges and a refrigerant recovery system
Its best to use a set of a/c gauges but if you are not then just add the freon to the low side which will be the larger hose (suction side)...