Manoli Katakis 
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: 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.
