Fluorescent Dye Injection

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Use only fluorescent dye approved by General Motors.

GE-41447 tracer dye can be poured directly into a removed air conditioning component.

Not all of the fluorescent dyes are compatible with all air conditioning oils. Some types of dye decrease the oil viscosity or may chemically react with the oil.
R-134A tracer dye requires time to work. Depending upon the leak rate, a leak may not become visible for between 15 minutes and 7 days.

NOTE:

Do NOT overcharge the air conditioning system with dye. Use only one 7.39 ml (0.25 oz) charge.

To prevent false diagnosis, thoroughly clean any residual dye from the service port with a rag and the approved fluorescent dye cleaner GE-43872 dye cleaner.