Refrigerant Leak Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Tools Required
- J 39400-A Halogen Leak Detector. See Special Tools .
- J 41447 R-134a A/C Tracer Dye-Box of 24. See Special Tools .
- J 41459 R-134a A/C Tracer Dye Injector. See Special Tools .
- J 42220 Universal 12V Leak Detection Lamp. See Special Tools .
- J 43872 Fluorescent Dye Cleaner. See Special Tools .
IMPORTANT:
General Motors vehicles are now manufactured with fluorescent dye installed directly into the A/C system.
The preferred method of leak testing is with the use of fluorescent dye. J 41447 is the only fluorescent dye approved by General Motors. See Special Tools .
The fluorescent dye mixes and flows with the PAG oil throughout the refrigerant system.
Verifying some passive leaks may require using the J 39400-A , even though the A/C system contains fluorescent dye. See Special Tools .
The only time that adding additional fluorescent dye is required is after flushing the A/C system.