Buick Repair Questions? Ask a Mechanic for Answers ASAP
Hello, the low side(charge port) is located at the compressor, the other fitting is the high side port. Ideally when charging the system you will want to use a gauge set to hook up to both ports to check for a proper charge amount.If the system is completely empty, you need to find the source of the leak. The system comes with a green dye n it that can be seen best using a back light.