HawaiiZR-1,
Early thought the A/C wasn't working correctly. The Tech checked both hi & low side and they have proper pressure.
Problem was bringing in the outside air. Tech recommended set to recycle air and all is good with 44 degree vent temp with 100 degrees Texas temp.
Did learn one thing when I attempted to put my gauges on the high side. Bought a Santech R12 high pressure port adapter for GM Deep Access 1991 & later part no.: MT0436
Thanks,
Gary
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