The latest 2021 Chevy Suburban introduces a remarkable twelfth generation for the iconic SUV, marking the longest-running automotive nameplate in history with 85 years of continuous production. Among the 2021 Suburban’s many features and upgrades is the option for a new diesel powerplant, and now, the EPA has released the official fuel economy estimates for diesel-powered 2021 Chevy Suburban models.
Looking over the latest EPA numbers, we find that 2021 Chevy Suburban models equipped with a diesel powerplant and 2WD post 21 mpg in the city, 27 mpg on the highway, and 23 mpg combined. The EPA also lists estimated annual fuel costs at $1,550.
|Engine||5.3L V8 L84||6.2L V8 L87||3.0L I6 LM2|
|Estimated Annuel Fuel Cost||$1,750||$2,450||$1,650|
Unsurprisingly, diesel-powered 2021 Chevy Suburban models provide greater fuel efficiency than gasoline-powered 2021 Chevy Suburban models. Per the latest EPA estimates, 2021 Suburban models equipped with the naturally aspirated L84 5.3L V8 gas engine and 2WD post 16 mpg in the city, 20 mpg on the highway, and 18 mpg combined, with an estimated annual fuel cost of $1,750. Meanwhile, 2021 Suburban models equipped with the naturally aspirated L87 6.2L V8 and 2WD post 15 mpg in the city, 20 mpg on the highway, and 17 mpg combined, with an estimated annual fuel cost of $2,450.
To note, the diesel engine in question here is the Duramax turbo-diesel LM2 3.0L I-6, which produces 277 horsepower at 3,750 rpm and 460 pound-feet of torque at 1,500 rpm. All three engines, including the LM2 diesel and the two gas-powered engines mentioned above, mate to GM’s Hydra-Matic 10L80 10-speed automatic transmission.
As these latest EPA figures demonstrate, the diesel-powered LM2 3.0L I6 engine is the go-to choice for those 2021 Chevy Suburban buyers concerned about overall fuel economy. Indeed, the diesel engine is the economical choice for the rest of GM’s full-size SUV lineup as well, as we’ve covered previously for the 2021 GMC Yukon and the 2021 Chevy Tahoe as well.