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General Motors Has Temporarily Ceased 3.0L Inline-Six Diesel Engine Production

GM General Motors Arlington Assembly Chevrolet Tahoe Suburban
Image Via GM

General Motors dealers have received a sudden message from the mothership stating that it’s halting orders of all vehicles optioned with the 3.0L LM2 Duramax diesel inline-six engine. The LM2 is a low-cost upgrade on the 2021 Chevrolet Tahoe, 2021 Chevrolet Suburban, 2021 GMC Yukon and Yukon Denali SUV families, as well as the stalwart Chevrolet Silverado 1500 and GMC Sierra 1500 pickup trucks. It’s a no-cost option on the 2021 Cadillac Escalade SUV.

The folks at TFL were first with the story. A comms person reached out to the outlet to say: “GM can confirm this is accurate due to a temporary part shortage. GM will resume production with the 3.0L Duramax diesel as soon as possible.”

LM2 Duramax Diesel GM T1 General Motors Trucks SUVs SUV Chevrolet Silverado GMC Sierra Cadillac Escalade Yukon Tahoe Suburban Denali XL
3.0L LM2 Duramax I6 Diesel Engine. Photo via GM.

LM2 Duramax Diesel: Available On All General Motors T1 Platform Vehicles

The LM2 Duramax diesel was recently made available on the 2022 Chevrolet Silverado 1500 LTD Trail Boss and the 2022 GMC Sierra 1500 Limited AT4. These aren’t to be confused with the refreshed 2022 Chevrolet Silverado 1500 and 2022 GMC Sierra 1500 debuting in the coming days and weeks. Prior to that, the 3.0L diesel’s availability was expanded to all GM T1 SUVs by Q4, 2020. As that happened, pricing for the LM2 option reduced on its pickup trucks, becoming cheaper than the 6.2L L87 V8. On the SUVs, the LM2 and L87 are the same price, allowing customers to choose between more horsepower (420 hp vs 277 hp), or more fuel economy. Torque specs are identical, at 460 lb-ft.

Duramax Updates Expected With 2022 Chevrolet Silverado 1500, GMC Sierra 1500

With the refreshed 2022 Silverado and 2022 Sierra, expect improvements on the maximum tow ratings on trucks equipped with the LM2 Duramax. At the moment, the six cylinder diesel falls well below what its competition can pull, which is ironic as long haul drivers that frequently tow love diesel engines. And speaking of the competition, the Chevrolet SIlverado 1500 Duramax and GMC Sierra 1500 Duramax face little direct competition on the market currently, as the 2021 Ford F-150 recently dropped its 3.0L Power Stroke V6 diesel offering as demand for the more powerful and capable PowerBoost hybrid has shined through. Stellantis still offers the EcoDiesel in the Ram 1500.

2022 Chevrolet Silverado High Country LTZ 1500 GMC Sierra SLT Denali General Motors GM Super Cruise hands free driving semi autonomous technology
Image via General Motors


Written by Manoli Katakis

Muscle Cars & Trucks was founded by Manoli Katakis - an automotive media veteran that has been covering the latest car news since 2009. His journalism has uncovered dozens of major product changes, updates, plans, and cancellations long before automakers were ready to make things official.

Some highlights over the years of his reporting include the uncovering of the Zora trademark before anybody else reported on the coming of a mid-engine Corvette, as well as the dead-accurate reporting of the coming of the Chevrolet Colorado ZR2, two years before it hit the market, and even before the debut of the concept vehicle. This type of reporting has immediately continued here, with reports of the original seventh-generation Camaro plans being shelved, as well as what's in store for the Chevrolet Silverado.

Some of his work can be found on massive automotive media outlets, such as Motor1. He also has been a guest on the 910AM Radio Station with Detroit News auto critic Henry Payne, as well as the enthusiast-oriented Camaro Show podcast.

Over the years, Manoli has interviewed various automotive industry titans, leaders, and people that make things happen otherwise. These include figureheads such as GM CEO Mary Barra, GM President Mark Reuss, automotive aftermarket icon Ken Lingenfelter, Dodge firebrand Tim Kuniskis, along with various chief engineers of vehicles such as the Ford F-150 & Mustang, Chevrolet Camaro & Corvette, and many more.

At MC&T, Manoli is taking his journalism expertise, deeply planted sources, driving abilities, and automotive industry knowledge to new levels, covering more vehicles and brands than ever before. This is the place where you will continue to read groundbreaking stories about American performance vehicles, pickup trucks, and sport utility vehicles. Here is where you’ll also read insights and quotes from various automotive subject matter experts on the latest relevant products, as well as some of the latest official news from their manufacturers.

Fun facts: he also once beat Corvette Racing driver Tommy Milner in an autocross with a Chevrolet Bolt EV. The biggest vehicle he’s ever driven is a John Deere mining truck. Besides a go-kart, the smallest vehicle he’s driven has been a Hyundai i10. He’s also spent time in the cockpit of various American performance vehicle icons, including the fifth-generation Chevrolet Camaro Z/28, Dodge Challenger Demon, and Ford Mustang GT350R. He has reviewed dozens of trucks, SUVs, and performance vehicles over the years.

One of his favorite new vehicles on the market today happens to be the Chevrolet Colorado ZR2 Bison. He is also a card carrying member of the Sports Car Club of America, and regularly participates in Detroit Region autocross events.

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