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Where is the low side port located. Thanks - 2003 GMC Envoy

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It's along the line coming from the firewall to the compressor. If you have a dryer on the low side, it might be on the dryer. See my tips at http://www.fixya.com/cars/r5833579-auto_truck_c_recharge

Posted on Sep 10, 2010

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The low side A/C service port is located in the low side line nearest to A/C compressor. Due to the design of low side hose, it is difficult to see. When looking down to locate the port, the low side rubber A/C line obstructs the view to the port. I would recommend removing top engine cover and driver side front plastic cover (That Covers ECU And Relays) to easily view the port and it will make it easier to access it if you need to charge the A/C system. Hope this helps you out.

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Location of low side a/c service port


The low side port is located in the low pressure side of the AC system, this is the larger of the two lines comming from the compressor.

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I need to locate the low side ac port. air conditioner needs charge and i cannot locate the right port.


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Your service port will always be in the larger line of the two .. which is low pressure side. It might be in the dryer also which is low side.. your dryer is about 3 inches across and 8 inches long and also has your pressure switch for the AC compressor in it.. holler if you dont find it now... thanks Jerry

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both of the a/c service ports should be located next to the pass. side strut tower. the low side adapter may be hard to find though. If youcan not find it there, it is possible that the low side port could possibly be at the dryer on the drivers side front up beside the condensor

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1 Answer

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