2019 GMC Sierra: 3.0-liter Duramax Power, Fuel Economy, Towing Specs Leaked (Video)

The Duramax diesel edges out Ford's PowerStroke diesel on horsepower and torque

2019 GMC Sierra 3.0-liter Duramax figures leaked
2019 GMC Sierra. [Photo: GMC]

A TFL reader sent in screenshots of the GM Canada details book on the 2019 GMC Sierra.

While we’ve known the 3.0-liter Duramax diesel engine is coming to the 2019 Chevy Silverado and GMC Sierra, we haven’t had firm numbers on power, torque or fuel economy. Now, thanks to a TFL reader who sent in some screenshots from GM Canada’s dealer site, we have more information.


According to these screenshots, the 3.0-liter Duramax engine available in the Sierra produces 282 horsepower and 450 lb-ft of torque. GM also seems to claim fuel economy of 28 mpg on the highway. However, no official figures are available from the EPA yet. The Duramax engine comes mated to GM’s 10-speed automatic transmission.

By comparison, we know Ford’s 3.0-liter PowerStroke diesel manages 250 horsepower and 440 lb-ft of torque. FCA’s EcoDiesel engine, at least in its last available form, manages 240 horsepower and 420 lb-ft of torque. As far as fuel economy is concerned, the 2018 F-150 3.0-liter diesel 4×2 gets up to 30 mpg on the highway.


On the 2019 GMC Sierra, the 3.0-liter Duramax diesel appears as an engine option on SLE, Elevation, SLT, AT4 and Denali trims. The SLE and Elevation will get the new 2.7-liter four-cylinder engine as standard equipment, while the SLT, AT4 and Denali are currently available with a 5.3-liter V8.

According to the above screenshot, the 2019 GMC Sierra with the 3.0-liter Duramax will be capable of towing up to 7,800 pounds. As the 2019 Silverado has the same powertrains as the Sierra, we’d expect it to achieve similar figures. Check back to TFLtruck.com for more news, views and real-world reviews!