I had a new/not rebuilt pump installed on my 98 Yukon, after going thru 3 from autozone in less than a year. It's a long story so i'll get to the point. Autozone agreed to buy me a new pump. I didn't inspect the pump before having it installed, (stupid me). My yukon doen't have hydroboost, but the new installed pump has the 3rd tube on the side of the reservoir which I figured is there for a hydroost setup. The mech who installed the pump connect a hose to this third tube (on the side of the reservoir), and put a vent fitting in the end of hose, and secured it to the A/C bracket. This "vent" leaks fluid like no tomorrow. Does anyone think I could tee this vent hose in with this return hose ?