Dealing with common problems with Duramax 6.6 engines

If you're hunting for a heavy-duty truck, you've likely heard about the common problems with Duramax 6.6 engines, but you've also heard they can last forever if you treat them right. It's a bit of a double-edged sword. These engines, found in Chevy and GMC heavy-duty pickups since 2001, have earned a massive following for their towing power and longevity. However, each generation of the 6.6L has its own set of "personality quirks"—some of which are cheap fixes, while others might make your wallet cry. ...

April 30, 2026 · 6 min · Bieniek Zulijani