Refrigerant Leak Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
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.