Hello,
The low side port is on the larger ac hose that goes from the firewall to the back of the compressor. Here are some guides and diagram (below) that will help you get the job done. This video will show you how to find it with diagrams below.
https://youtu.be/ON2dYcmXIAw
Please let us know if you need anything else to get the problem fixed.
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Wednesday, July 5th, 2017 AT 6:31 PM