As with its Chevy sibling, the Sierra offers a plethora of powertrains that include both new and updated options. While the 285-hp 4.3-liter V-6 and the 355-hp 5.3-liter V-8 continue with a six-speed automatic and cylinder deactivation, another version of the 5.3-liter is available with an eight-speed transmission and GM's new Dynamic Fuel Management. Unlike traditional cylinder deactivation that shuts off specific cylinders, this more sophisticated fuel-saving system targets individual cylinders using an algorithm that increases efficiency and reduces vibrations. This technology also extends to the 420-hp 6.2-liter V-8, which connects to a 10-speed automatic for the first time in the Sierra. Eventually, the Sierra lineup will include a 310-hp turbocharged 2.7-liter inline-four paired with the eight-speed; an optional diesel 3.0-liter inline-six (accompanied by the 10-speed automatic) also has been confirmed, but full details have yet to be released.
2019 GMC Sierra 1500 - YouTube |
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