Searching for the location of the a/c low-side service port in a 2000 Monte Carlo to attach auto air conditioner R-134a

The low pressure port in the AC system is between the evaporator which is in the heater/AV housing in the dash. The line between that part and the compressor is the low pressure or suction line. You should find a connector in that line that has a cap on it. When you take the cap off, it is a snap on quick disconnect with a "tire stem valve" in it. Be sure to screw the cap back on with you are finished.

Thanks for using FixYa.

Gaker

On hot day @ 85=+ degrees it should be between 45 to 50 pounds on the low side pressure port

The Air Conditioning Ports (High Side and Low Side) are different Sizes.

The High Side is Larger and RED
The Low Side is Smaller and Blue

ALWAYS FILL on the LOW SIDE

If you buy a recharge can from your local auto parts store the connector will only fit on the high side. It is usually bigger then the low side so the connector will only clip onto the high side connector.

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Check under the air filter case, under the hood on drivers side.

rear of enginge passenger side

Remove the air cleaner box to find the accumulator and I think the low side charge port is next to it

hello dsouris: Locate the A/C accumulator on the left inner fender well. This will be a round aluminum cylinder with two lines coming out of it. Follow the large line that runs back to the firewall. You should see a shadder valve in this line. This will be the suction line or low side line. This will be the line used to charge the A/C system. If you need further help please just ask. If this information please rate the information as it helps.Thank You for using FixYa. Roger

always charge too the large port .it may have a blue cap on it.

go to auto zone and buy a 134 recharge kit follow the directions on the box, you will need to find to LOW side service port there are two ports with plastic caps on the ac lines you are looking for the one that is attached to a larger diameter ac line. the kit will ONLY FIT ON THIS FITTING so you dont have to worry, there is a label under the hood somewhere thats green and says how much 134a you should install be carefull wear safety googles and good luck, please rate -jeff