Details of GM’s new LZ0 diesel engine finally released

For months we’ve been exploring big news from GM on the LZ0 diesel engine. Although a few updates were “leaked”, nothing was really serious until today. GM has officially released details of the LZ0 3.0-liter straight-six engine, which is the second edition of its Duramax six-cylinder. Select trim packages for the Chevrolet Silverado 1500 will receive this turbocharged engine.

So, what’s up with this device? The LM2 gone, the LZ0 will gladly take over. This new engine is rated at 305 horsepower and 495 lb-ft of torque, representing a 7.6% power increase. To compare, the LM2 only made 277 horsepower and 460 lb-ft. This makes it the most powerful diesel mill in GM’s 1500 pickups.

Once you start peeling back the layers of the LZ0, you’ll see it features upgraded steel pistons, a revised combustion bowl, retuned turbocharger and fuel injectors, and also benefits from improved temperature control. GM took your concerns on board, looked at the problematic (or at least potentially problematic) areas, and built from there. The next generation of light diesel looks promising.

“These enhancements to the popular 3.0-liter Duramax build on the already advanced design of the first-generation engine,” said John Barta, GM’s assistant chief diesel engine engineer. “We often hear from customers expressing their satisfaction with the outstanding fuel economy and quiet, smooth power of today’s diesel engine, so we look forward to them experiencing this advanced engine made possible by the evolution continuous design and advancements in engine technologies.”

The new 3.0-liter LZ0 turbocharged diesel engine will be available under the hood of select 2023 models, including Custom Trail Boss, LT, RST, LT Trail Boss, LTZ and High Country. The new Duramax LZ0 diesel engine will mate exclusively with GM’s 10-speed automatic transmission. Engine assembly will take place at the GM Flint Engine Operations plant in Michigan, and availability is expected to open by the end of calendar year 2022.

Who’s ready? I know we are.

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