GM has lifted the stop-sale order that was effective on the Chevy Silverado HD and GMC Sierra HD pickups equipped with the 6.6L V8 L5P turbodiesel Duramax engine.

The L5P also uses an intake rocker-arm with a 1.39 ratio and exhaust arm with a 1.69 ratio, which increases the camshaft’s total lift to 0.540 inch (intake) and 0.664 inch (exhaust).

As of this writing, the L5P Duramax is the longest-lasting Duramax ever built by General Motors. It's currently in its second phase of life, with the first phase ending after the 2023 model year.

The Duramax V8 engine has a special place in the hearts of Chevy fans, but not all Duramax engines are equally regarded. Here are the best versions.

Complete information, specs, power and torque ratings on GM's 6.6L L5P V8 Turbo Diesel Duramax engine used in the Chevy Silverado HD and GMC Sierra HD.

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The Banks Power L5P Duramax churns out more than double the stock horsepower and almost double the torque of the Dodge Challenger SRT Hellcat Redeye ...

Introduced in 2001, the Duramax V8 turbo diesel family was continuously improved over the years until the L5P that GM uses in heavy-duty trucks. Fully stock, the 6.6-liter mill develops 445 ...

Banks turned his trials into a YouTube series in which you can watch hours of video, all aimed at making the current-gen L5P Duramax throw its “crank on the floor or heads on the ceiling.” ...

The L5P also uses an intake rocker-arm with a 1.39 ratio and exhaust arm with a 1.69 ratio, which increases the camshaft’s total lift to 0.540 inch (intake) and 0.664 inch (exhaust).