LS V8-3.9L VIN A (2003)
2. Fill the special tool reservoir with 7 ml (0.25 oz) of fluorescent dye.
3. Install the special tool between the high-pressure and low-pressure service gauge port valves.
4. CAUTION: Make sure all tools and hoses are clear of the engine cooling fan and drive belt before starting the engine.
Start the engine.
5. Open the high-pressure service valve.
6. Open the special tool valves and inject the fluorescent dye into the refrigerant system.
7. Close the high-pressure service valve to allow the pressure inside the special tool to equalize with the suction side of the refrigerant system.
8. NOTE: Close the valves on the special tool while the A/C compressor is operating.