Operation CHARM
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GMC Truck
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1989
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R 2500 P/U 2WD L6-292 4.8L
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Repair and Diagnosis
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Heating and Air Conditioning
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Service Port HVAC
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Locations
Service Port HVAC: Locations
HVAC Component View:
The high pressure fitting is located either in the high pressure vapor line or muffler, while the low pressure fitting is located on the accumulator.