Production of General Motors’ turbocharged 3.0L I6 LM2 Duramax diesel engine has been temporarily halted. According to a GM spokesperson, the stoppage is due to a temporary supplier issue.
“We have currently paused production of trucks with the 3.0L Duramax Diesel engine due to a temporary part shortage,” said Manager, Chevrolet Trucks and Full-Size SUV Communications, Megan Soule, in a statement to GM Authority. “We will resume production with the 3.0L Duramax diesel as soon as possible.”
The turbocharged 3.0L I6 LM2 Duramax diesel engine is offered as an option for GM’s full-size pickup trucks, including the Chevy Silverado 1500 and GMC Sierra 1500, as well as all next-generation full-size GM SUVs, including the Chevy Tahoe, Chevy Suburban, GMC Yukon, and Cadillac Escalade.
Output is rated at 277 horsepower at 3,750 rpm and 460 pound-feet of torque at 1,500 rpm. Production of the turbocharged 3.0L I6 LM2 Duramax diesel engine takes place at the GM Flint Engine Plant in Flint, Michigan.
Features for the turbocharged 3.0L I6 LM2 Duramax diesel engine include an aluminum head and aluminum block, as well as a forged steel crankshaft and forged rods. The pistons are made from hypereutetic cast aluminum alloy, while the cylinder liners are made from iron.
The turbocharged 3.0L I6 LM2 Duramax diesel engine incorporates a DOHC valvetrain, 84mm bore, and 90mm stroke, with a 15.0:1 compression ratio. The fueling system incorporates a common rail with direct fuel injection. Induction air is chilled using a liquid-to-air intercooler.
Offering loads of low-end torque that make it a great option for towing duties, the turbocharged 3.0L I6 LM2 Duramax diesel engine also yields high fuel returns. For example, when equipped in the 2021 Chevy Suburban with rear-wheel drive, the LM2 provides 21 mpg in the city, 27 mpg on the highway, and 23 mpg combined, with an annual estimated fuel cost of $1,650.