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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1909 (Heating, Ventilation, And Air Conditioning) >> Diagnostic Information and Procedures >> Leak Testing (With HP5) >> Refrigerant Leak Testing

Refrigerant Leak Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
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 polyester refrigerant oil (POE) throughout the refrigerant system.

Verifying some passive leaks may require using the J 39400-A:  Halogen Leak Detector, even though the A/C system contains fluorescent dye.

The only time that adding additional fluorescent dye is required is after flushing the A/C system.

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