Question about 1987 Pontiac Grand Am

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Where is low side ac port on 98 grand am - 1987 Pontiac Grand Am

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  • Pontiac Master
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Low side should be bigger of the 2 hoses.

Posted on Jun 26, 2009

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Passenger side near the front.should have a green or black cap on it. Will be on an aluminum tube.

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


The easiest way to locate the low side charge port on any vehicle is to locate the A/C compressor, follow the "larger" of the two lines all the way back to the firewall. Some where along that line you will find the low side charge port.
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Want to know which is the low pressure port on my


the low pressure port is on the side that contains the larger of the 2 ac lines from the compressor

Jul 22, 2010 | Cars & Trucks

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mcdevito75 here, The low side port of your A/C is located on one of the shiny metal lines comeing out of the firewall, they are attached to the evaporator under the dash, from the firewall carefully follow these silver lines till you reach the charge port. The port may be covered with a brass looking cap, un srew the capp and the port looks like the valve on the tire.

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Where is the low port side on a 96 grand am?


Most of the time they are on the underneth,of the engine compartment on passengers side,on the rear of the ac compressor on the low side line,Find the ac compressor,and follow the large ac line coming from it,and it will take you right to it.

Jun 05, 2010 | 1996 Pontiac Grand Am

1 Answer

Where is the low side service port on a 2003 grand am (6cyl)


If your talking about the low side sevice port to charge your ac, its easy to find. With your recharge kit, it comes with a nozzle to attach to this lowside port. Each port, (lowside and highside), are different diameters. The charging nozzle will ONLY fit onto the lowside port. Just run the length of your ac lines from the compressor and trace them back to the firewall. You should find both ports before you hit the firewall.

Jul 10, 2009 | 2003 Pontiac Grand Am

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Adding freon to 98 Isuzu Amigo


You need to add the freon on the low side which is usually indicated by a blue cap. The red cap is the high side port. Never add freon using the high side port. Typically if you are buying a guage set from your local auto parts store, it will only attach to the low side service port because they are diffent types of connections. Another easy way to tell is to turn your AC on and feel the lines that the ports are attached to. The low side should be cold/cool and the high side will be hot.

Jun 28, 2009 | 1999 Isuzu Amigo

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97 grand am low pressure port to recharge


The low pressure port is on the compressor on the bottom side. It should have a black cap on it.

Jul 24, 2008 | 1996 Pontiac Grand Am

1 Answer

AC Port


actually the low side port is on the firewall behind the engine the high is up front by the compressor

Jun 08, 2008 | 1998 Pontiac Grand Am

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