Fixing your 04 duramax water pump

If you've noticed a puddle of coolant forming under your truck lately, your 04 duramax water pump is likely starting to give up the ghost. It's one of those repairs that every Duramax owner eventually has to face, usually right around the time the odometer starts creeping up toward the 150,000-mile mark. It isn't exactly the easiest job in the world—honestly, it's a bit of a bear—but it's something you can definitely handle in your own garage if you have the right tools and a healthy dose of patience. ...

February 12, 2026 · 6 min · Oakley Virgini