GE-47716 is used to evacuate and refill the vehicle cooling system. This tool significantly enhances coolant fill efficiency across all cooling systems. This tool works exceptionally well on cooling systems prone to airlocks. The tool replicates the fill process used in assembly plants, enabling technicians to pull multiple deep vacuums on the cooling system as a whole. The technician can pull a deep vacuum to find and correct coolant leaks before filling and thermocycling the system. GM-47716 also allows the technician to remove coolant from a system using an included pipe to pull coolant into the tool drain reservoir.