Duramax Water Pump Replacement - Part I
We're here to save you money and provide the information you need to do the best job possible.
Own one of these trucks long enough and you'll eventually be faced with the prospect of replacing the original water pump. Normal cooling system pressure is in the range of 8-10 psi. The water pump's coolant-side seal is there to contain this pressure against a spinning shaft. Over time, this seal will wear until it begins to leak coolant. That's your cue for a need to install a new pump. What we'll do in this two part series is explain how to correctly identify a leaking water pump seal, give you a list of part numbers you'll need for the new parts, identify the special tools you'll need, and show you how to do the work using large clear photos and easy to follow instructions.