Fluorescent Dye Injection

NOTE: Use only fluorescent dye approved by General Motors.

Not all of the fluorescent dyes are compatible with PAG oil. Some types of dye decrease the oil viscosity or may chemically react with the oil.
R-134A leak detection 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 A/C system with dye.
To prevent false diagnosis, thoroughly clean any residual dye from the service port with a rag and an approved fluorescent dye cleaner.