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Ron Z.
Ron Z., - GMC Tech -
Category: GM
Satisfied Customers: 17940
Experience:  18+yrs experience. State Inspector & GM Diagnostics/Repair
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I have a 1997 gmc Jimmy that I am trying to charge with freeon...not

Customer Question

I have a 1997 gmc Jimmy that I am trying to charge with freeon...not sure which port to use as the one on the small metal tubing is to large and the one on the refrigerant cylinder is the right size.
JA: The mechanics have tons of experience in that area. Are those all of the "symptoms"?
Customer: yes
JA: Anything else I can tell the GM Mechanic before I connect you two?
Customer: no
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Submitted: 8 months ago.
Category: GM
Expert:  Ron Z. replied 8 months ago.
Freon is added to the system via the Low Side Service Port. The Low Side Port is the smaller of the two ports. For an image location view, click here: https://www.dropbox.com/s/c1yv2g4pvq6ou2j/gm-low.jpg?dl=0If my answer has helped you, please help me by leaving a rating or accepting my answer so I may be credited. Rating or accepting my answer does not cost you extra. It allows me to be credited for my work. Please rate or accept so I may be credited. You can ask follow-up questions after you rate or accept.
Customer: replied 8 months ago.
The hose that came with the freeon does not fit at that port it would fit on the port on the cylinder
so what do I do?
Expert:  Ron Z. replied 8 months ago.
This is an r134 system. It's the standard on all vehicles. The re-charge can will only fit on one port. Make sure you have located the ports correctly. Here is an image of the "high side" port - this is NOT the port to charge: https://www.dropbox.com/s/1206bx4gffjagxd/high-port.jpg?dl=0
Customer: replied 8 months ago.
my port is larger than the coupler....
If it isn't on the cylinder then wear can it be?
Expert:  Ron Z. replied 8 months ago.
Unfortunately, I've been looking for a better location... but due to the year, I cannot. It's on the other A/C line. Start at the Condenser and work upwards until you run into it. It's located on the line that connects where the red arrow points to in this image: https://www.dropbox.com/s/1206bx4gffjagxd/high-port.jpg?dl=0

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