Having problems with your 2003 GMC Envoy ?
Where is the low side port located. Thanks - 2003 GMC Envoy
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
Repair Help & Product Troubleshooting for 2003 GMC Envoy
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