If you own a 2017–2025 Chevy Silverado or GMC Sierra HD with the 6.6L L5P Duramax, you already know it’s a powerhouse—445 hp and 910 lb-ft from the factory. But even this engine has limits, and most ...

For decades now, the big three American automakers have been engaged in a game of one-upmanship over which company can fit the most powerful and torquiest diesel engines in their trucks. And, just as ...

General Motors has been using Duramax diesel engines in certain workhorse models for nearly a quarter century. The 6.6-liter V8 version which powers Chevy Silverado 2500/3500HD and GMC Sierra Heavy ...

Features:The turbo-back aluminized and stainless steel exhaust systems for the Power Stroke help improve airflow for quicker spool-up and lower exhaust gas temperatures, especially if you're running a ...

If you are tired of eating up front disc brakes and having to lay on the brake pedal longer than you’d like when your late-model GM HD pickup is towing a big gooseneck or heavy tow-behind trailer, we ...

Late last week, General Motors announced it had built its two millionth Duramax engine, an L5P unit bound for either a 2017 Chevrolet Silverado HD or GMC Sierra HD. The L5P, which was recently ...

General Motors' Duramax diesel engine lineup has been powering GM trucks and SUVs and enthralling gearheads since its original release in 2001. While the most famous member of the Duramax roster is ...

Optimum exhaust flow is critical to maximizing the efficiency of any engine. After all, an engine is just a sophisticated air pump – and the easier it is to move air in and out, the more efficient the ...