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GM Duramax 3.0L Turbo Diesel Assigned RPO Code LM2

We still don’t know the power ratings of the upcoming GM Duramax 3.0L Turbo Diesel inline-six-cylinder engine, but we now know one more detail about the highly-anticipated motor.

GM Authority has uncovered the official RPO code of the new baby Duramax, with Tom Read of GM Powertrain communications telling us that the new 3.0L Duramax is assigned RPO code LM2. In the 2019 Silverado 1500, the new straight six Duramax will be mated to the new GM 10-speed automatic transmission.

Power, torque and fuel economy figures for the LM2 are not yet available, and will be released closer to the launch of the all-new 2019 Silverado Diesel and 2019 Sierra Diesel, the two launch vehicles for the new motor. So far, our only clue comes from the official reveal presentation for the all-new 2019 Silverado 1500, during which GM product chief, Mark Reuss, stated that the new 3.0L Duramax diesel will be class-leading.

“One of the new engine choices is an all-new three-liter Duramax diesel, which is an in-line six that builds on our diesel expertise”, said Reuss. “Now I’m not going to go into the numbers today, but some of our competition has already given their numbers on their new diesel, and I am really confident that we’ll have the best-performing diesel in this segment”.

In order for the new 3.0L Duramax Diesel to be truly “best-performing” in the segment, it would need to beat the 250 horsepower and 440 pound-feet of torque ratings of Ford’s new 3.0L PowerStroke in the 2019 F-150.

Stay tuned to GM Authority for more GM Duramax 3.0L LM2 news coverage, as well as for Silverado news and Sierra news.

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GM Authority Executive Editor with a passion for business strategy and fast cars.

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Comments

  1. Seriously, Chevy couldn’t make this available in the LT Trailboss? My biggest disappointment with the 2019s.

    Reply
    1. Maybe it will be an option for the ZR2(?)?

      Reply
  2. 300HP/500TQ

    Reply
  3. Colorado 4×4 LTZ 3.0L D. Excellent workhorse! But still, dat 2.7L inline-4 turbo….

    Reply
  4. Why can’t GM go back to the days in which you could cafeteria style order all your options? A lot of of folks would love the diesel in the most bare bones work truck they can order.

    Reply
  5. Because people cant police themselves and use the truck the way it was designed to. If you installed a duramax 6.6 in a 1/2 ton truck then people would think they could haul/tow 20,000 pounds. Then when the truck breaks that person takes the truck to the dealer and says the truck is crap.

    GM has to make repairs under warranty that they shouldn’t have to because of miss use!

    That’s why they dont

    Reply
    1. That is not at all the point I was trying to make. I mean that in a 1/2 ton truck you should be able to get a 6.2 or 3.0 diesel in a bare bones truck. Not be forced to buy a premium trim level.

      Reply
      1. Why would you put a premium engine in a cheap package? It just goes to show you people are cheap!

        I would have no problem seeing a a 6.2 engine in a 1/2 ton regular cab in LTZ trim! But not in a work truck trim!

        Reply
        1. Who wouldn’t you give folks that option? It is not necessarily due to the fact they are “cheap” but maybe neither want nor need all the bells and whistles of a high level trim package but DO want the better engine choice. Not sure of your age but I am old enough to remember when you could walk into a Chevy dealer and order an bare bones Bel Air with dog dish hubcaps, bench seats and rubber floor mats and get any engine from the old straight 6 to a top of the line L72 427. There is a market out there for people who don’t want powertrain selection tied to trim level. At least you can get a bare bones Ram Tradesman with a Hemi.

          Reply
          1. Exactly. People like my parents don’t give a shit about fancy infotainment system, wireless charging, etc. They’d like a basic truck as simple as possible but still would enjoy having the bigger engine or maybe the diesel.

            Reply
  6. Concur that the diesels should find their way into the entry level trucks. It would certainly help bring down the fleet consumption average. More importantly, I hope this makes it’s way into a Suburban or Tahoe. Since Chevy doesn’t seem to be making any progress on a body on “Colorado” frame SUV, This engine seems like it would be the only way to get reasonable and fuel economy out of Chevy’ s otherwise lackluster SUV lineup.

    Reply

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