General Motors resumes production of its 3.0-liter inline-six diesel

General Motors temporarily stopped taking orders for trucks and SUVs equipped with the Duramax 3.0-liter six-cylinder turbo-diesel engine in August 2021 due to a shortage of suppliers. Reports have claimed the hiatus will last until 2021, but the engine is already back in production.

Passionate site GM Authority learned from sources inside General Motors that the inline-six is ​​once again coming off the assembly line at Flint’s engine plant in Flint, Michigan. There is no official word on exactly what the problem was related to and whether it was related to the current chip shortage which is wreaking havoc in the auto industry. All we know is that the break lasted for about two weeks.

Called LM2 internally, the six is ​​available in the Chevrolet Tahoe, Suburban and Silverado 1500 and in the GMC version of these trucks. It is also an option in the Cadillac Escalade. It develops 277 horsepower at 3,750 rpm and V8-like torque of 460 pound-feet at 1,500 rpm in every application, and it gives these big behemoths a surprising fuel economy figure. Mounted on a rear-wheel-drive Tahoe, the Duramax brings in 21 mpg in the city, 28 mpg on the highway and 24 mpg in the combined cycle, numbers that make it more efficient than a Blazer.

The demand for diesel trucks is relatively high. While the shortage undoubtedly took a toll on sales, the Duramax accounted for 8% of Suburban’s sales and 6% of Tahoe’s sales in May 2021. There are no other full-size SUVs running at the new diesel, so they have the market for themselves. On the truck side, Ram still offers the EcoDiesel on some 1,500 versions, but Ford has abandoned the segment.

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