Chevy and GMC Duramax Diesel Forum - Reply to Topic
2020+ LM2 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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  Topic Review (Newest First)
11-11-2019 01:52 PM
Swdsaenz That’s what they said about the 2.8 duramax and has not been my experience. Numerous blown sensors, particulate filter issues, and now a ridiculous turbo issue. Wastegate rod fell off, cannot be replaced without buying the entire turbo. Like getting a flat and having to buy new truck. I’d look at RAM as it generates more torque , close on mileage and way higher towing weights.
10-28-2019 05:05 AM
buelldude I got one this weekend, the 2.8 Colorado is gone. Its nice being back in a full size.
10-25-2019 09:46 AM
Originally Posted by poosniffer View Post
I am really considering one of these but at $66K msrp...OUCH!!!
That one is now sold. They have a Denali with the little diesel, but the discount is much less.
10-25-2019 09:42 AM
Originally Posted by LeonardS View Post
Wilhelm Chev, Buick, GMC in Jamestown, ND has one in AT4 with $12,000+ discount. $66,000 list and $53,000+ selling price.
I am really considering one of these but at $66K msrp...OUCH!!!
10-08-2019 04:38 AM
LeonardS Wilhelm Chev, Buick, GMC in Jamestown, ND has one in AT4 with $12,000+ discount. $66,000 list and $53,000+ selling price.
10-07-2019 09:56 PM
GodFather2u I guess its still making its way to the west coast
10-06-2019 06:29 PM
Originally Posted by GodFather2u View Post
Anyone physically see, touch, and smell one yet? I mean, other than YouTube.
Couple on lots.

A Denali with one passed me on the freeway the other day.
10-06-2019 09:04 AM
Hook'em_Horns! There are 2 at a nearby Dealer I could touch and feel, if I wanted.
10-06-2019 07:59 AM
GodFather2u Anyone physically see, touch, and smell one yet? I mean, other than YouTube.
09-05-2019 10:51 AM
New LM2 Forum!

All New 3.0L I-6 Duramax Diesel for 2020 1500s.
Originally Posted by DmaxStore
The 2020 Silverado and Sierra 1500 has multiple all new Powertrains offered, with 5 different engines to choose from there is a good option for anybody in the light duty truck market.

One of the most notable engines is the all new 3.0 liter inline six turbo diesel, this was an all new engine designed in house by General Motors.

They could choose from virtually any engine architecture they wanted, GM chose the inline six for the many efficiency advantages.
The inline six motor is inherently balanced, low friction, and low weight compared to some other engine architectures, all of these advantages result in a smoother, cleaner operating engine. This diesel engine weights in at only 212 KG, only 5 more KG than the 5.3 liter gasoline option that is available.

The block for the LM2 has been constructed from aluminum along with the cylinder heads, this keeps the weight at a minimum. In order to keep the strength in the cylinder walls they have inserted a metal sleeve without sacrificing any weight the a cast iron block would add.

The pistons are also constructed from aluminum to keep the rotating mass down to keep the engine running efficiently. The lower crank case is extended downward to provide further stiffness and strengthening the block.

The fuel system is all new and has the highest rail pressure compared to any of the other diesels in the segment, at 2,500 bar (36,350 psi) it allows for improved atomization of the fuel in the cylinders.

This allows the LM2 to have a much higher power density than the other engines within the segment. The injection system allows up to 10 injections per cycle, this will improve the combustion process resulting in a quieter operating system.

The intake system utilizes a dual intake runner manifold set up allowing them to use a swirl valve to change the length of the intake runner improving swirl effect throughout the entire RPM range, the swirl effect will allow for more efficient combustion within the cylinders.

To supply the air to the engine a Honeywell turbocharger makes 29 PSI of boost, this turbo utilizes electronically controlled vanes, and ball bearing technology to provide a quick spool up off the line.

Overall GM seems to have put a lot of money, time, and effort into making a reliable and stout engine that will be more efficient and more powerful than the competition.

Power and Torque:
277 HP at 3750 RPM
460 lb-ft at 1500 RPM

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