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GM To Invest $920M At DMAX Plant For Heavy-Duty Truck Engine Production

GM is set to invest almost $1 billion into the DMAX plant in Brookville. The investment will support production of internal combustion engines set for use in the automaker’s heavy-duty truck line, including a considerable expansion to the facility’s footprint. Construction is set to begin immediately.

Duramax badge on a heavy-duty GM pickup truck.

According to a recent report from WDTN, GM announced the new investment at the DMAX plant in Brookville on Friday. The $920 investment will quadruple the existing facility footprint, adding 1.1 million square feet of space. Site development was recently approved by officials, as GM Authority covered previously. GM purchased 53 acres of land near the existing DMX Brookville plant late in 2021. The parcel was left largely untouched in the years since.

Per previous GM Authority coverage, some are worried that the expansion to the DMAX Brookville plant will move jobs away from the GM DMAX Moraine plant in order to support the newly expanded Brookville facility. DMAX serves as a joint venture between GM and Isuzu, with GM holding a majority stake. The joint venture is responsible for producing diesel engines found throughout GM’s lineup.

GM DMAX plant in Moraine

The $920 million slated for the DMAX plant in Brookville is only the latest investment news to come from GM as of late with regard to its heavy-duty truck line and internal-combustion engines. The General also recently announced a massive $1 billion investment for its Flint Assembly and Flint Metal Center manufacturing sites in Michigan to support full-size pickup production and next-generation ICE-based heavy-duty trucks, with $788 million for the GM Flint Assembly plant for a body shop expansion, general assembly conveyor expansion, new tooling, and equipment, as well as a further $233 million for the Flint Metal Center for new stamping dies, press refurbishments, and new equipment.

GM has also announced a $632 million investment for its Fort Wayne Assembly plant in Indiana to support next-gen ICE-based light-duty truck production, $209 million for the GM Oshawa plant in Canada to support ICE-based HD truck production, and $500 million for the GM Arlington plant in Texas to support next-gen full-size SUV production.

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Jonathan is an automotive journalist based out of Southern California. He loves anything and everything on four wheels.

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Comments

  1. I may be wrong, but I see this as proof positive that the ICE/diesel engines will not be going away any time soon. EV’s will not be the only thing available after 2030. GM and others would not invest this much into ICE/Diesel if they would be going away soon. I think this is good. Not everyone does or will want an EV and for now an EV just won’t work for some. What I like about the EV’s becoming much more prevalent is that it should help to allow ICE/Diesel be around even longer. They still need to continue to improve the emissions and hopefully the HD trucks will become more efficient and cleaner. I am also hopeful the hybrids (both gas/ev and diesel/ev) would become popular. Kind of like what Ram is doing with it’s EV truck.

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    1. It is all about the profits that big trucks bring in. This pretty much cements they’ll have backing for EV’s.

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      1. The longer I live the more you come to realise that everything is about money.

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    2. I agree. Let people choose what they drive. Have ev and ICE both on the roads.

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  2. I don’t think ICE is going away at all. MaybE thE scalE of production will declinE significantly, but until they are bannEd, thErE is monEy to bE madE. ThEy nEEd to pay for thEir EV rEVolution somEhow and this onE of thosE ways.

    Reply
    1. Places that ban ICE will decline just as communist countries decline. More than likely the band will be short lived. At the rate people are leaving California, nobody will even live there by the time the ban goes into effect 😂😂😂

      My humble opinion? Even if we decided to go all in on nuke power, and used it to synthesize fuel, diesel wouldn’t go away. It’s highly safe and efficient, unlike batteries which are not safe, and loose a ton of power through recharge/discharge/conversion/distribution/motor inefficiency. Ice is very direct and safe.

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  3. Places like the artic cold weathers and Sahara heat in remote areas of the world. Big ice vehicles are the only thing that can make it, not to mention rural areas aren’t going EV anytime soon.GM will clean up globally if no one else makes v8’s/diesel.

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    1. You are mistaken on three counts. First electric motors can operate in ANY ENVIRONMENT, even under underwater and in a vacuum. Second, there are special cell chemistry that can handle extreme cold (using sodium instead of lithium) and extreme heat. Third, in rural areas. EV owners get free energy from photovoltaic panels. So by the 2050s, there will be no more need of fuel based engines. As an Engineer who follows engine technology since 1966 (my mother’s cousin worked on the first Wankel cars in Germany and taught me about it), I know that the ICE is dying and no more will be built in the future.

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      1. You may be right but I think it will take a lot longer than 2050.

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  4. Good news!

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  5. I believe ICE vehicles will be here for a long time also. Battery powered vehicles are not environmentally friendly and are very harmful for the environment as we all know. So let’s move away from over reach government regulations and let the market decide their preferred mode of transportation.

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    1. I have no problem with ICE vehicles as long as the technology keeps evolving and they are well maintained. However, I do object to noisy lawn mowers, leaf blowers and edge trimmers.

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  6. I say let everyone choose what they want to drive, sure have ev’s available but don’t ban ICE, that’s my opinion. For me I’m sticking with diesel and gas until I absolutely can’t anymore. The ev would go over a lot better though if they didnt look so ridiculous, like something straight out of the Jetsons tv show lol.

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  7. We do not have the infrastructure to power everyone with an EV and it’s not feasible. Not yet anyways!!!

    Reply

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