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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 309 (Heating, Ventilation, And Air Conditioning) >> Diagnostic Information and Procedures >> Leak Testing (HP2) >> Refrigerant Leak Testing

Refrigerant Leak Testing

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NOTE:

All A/C system repairs must be verified using electronic leak detection. Dye detection may take up 2 or 3 days to be reliable.

NOTE:

General Motors vehicles are now manufactured with fluorescent dye installed directly into the air conditioning (A/C) system.

The fluorescent dye mixes and flows with the refrigerant oil throughout the refrigerant system.

Verifying some passive leaks may require using the GE-50078  Infrared Refrigerant Leak Detector, even though the A/C system contains fluorescent dye.