Previously the 10-speed automatic was only available on GMC Sierra 1500s equipped with either the 6.2-liter V8 or 3.0-liter Duramax diesel engines, however, it will now be standard on Sierra SLT, AT4 and Denali models equipped with the 5.3-liter V8 and four-wheel-drive. It will also be an optional upgrade for SLE trim level trucks with four-wheel-drive. That means base trim level models with the 5.3-liter engine won’t be offered with the 10-speed, nor will 5.3-liter-powered two-wheel-drive models.
Other major changes applied to the 2020 GMC Sierra include the addition of the 3.0-liter Duramax diesel to the CarbonPro Edition engine lineup (it was previously only offered with the 6.2-liter V8) and the expansion of the Elevation trim to Crew Cab trucks. Tech updates are limited to a new camera-based adaptive cruise control system for SLT, AT4 and Denali models and an updated eight-inch infotainment screen that supports SiriusXM with 360L audio.
“The Sierra is delivering the tech customers want in the light-duty truck market, and the 2020 model demonstrates that Professional Grade means never slowing down,” GMC vice-president Duncan Aldred said. “The truck’s 2020 updates show how the Sierra continues to raise the bar year in and year out.”
The 2020 GMC Sierra 1500 will go into production at GM’s Fort Wayne Assembly plant in Indiana shortly, with sales slated to begin later this year. Pricing will be announced at a later date.