We already knew that the next generation of full-size SUVs from General Motors – including the 2021 Chevrolet Tahoe, Chevrolet Suburban, GMC Yukon, and Cadillac Escalade – would offer a diesel engine option. But now we know how efficient that powertrain makes the large three-row SUVs – or at least iterations with two-wheel drive – make.
The 2021 Chevrolet Tahoe Diesel tops the lineup with a rating of 24 mpg in combined city and highway driving. It’s much more economical than the Tahoe gas, which exceeds 18 mpg. The beefier 2021 Chevrolet Suburban Diesel hits 23 mpg, a sum that beats the gas model’s rating by 5 mpg. As a reference, the EPA rates the 2021 Infiniti Q60 sports coupe with 22 mpg combined – regardless of the condition of the six-cylinder engine.
The diesel-powered GMC Yukon also impresses with 23 mpg. This number applies regardless of whether you opt for the regular version or the long wheelbase. The Yukon Gas receives a maximum rating of 18 mpg. Likewise, the luxurious Escalade diesel achieves 23 MPG before the 17 MPG of the model’s robust 6.2-liter V8 gas engine.
GM’s full-size SUV’s 3.0-liter in-line six-cylinder turbodiesel is said to deliver 277 horsepower and 460 lb-ft of torque on all models. The power is transmitted via a well-known 10-speed automatic transmission. GM has only released fuel consumption figures for rear-wheel drive versions of the diesel SUVs. All-wheel drive variants will likely come in 1 or 2 mpg lower.
GM full-size SUVs Diesel MPG
2021 Chevrolet Tahoe Diesel: 21/28/24 mpg
2021 Chevrolet Suburban Diesel: 21/27/23 mpg
2021 GMC Yukon Diesel: 21/27/23 mpg
2021 Cadillac Escalade Diesel: 21/27/23 mpg