For the past year, GM Authority has been reporting about the upcoming refresh to GM’s full-size heavy duty pickup pickup trucks. And now, our spies have captured the very first photos of the 2024 GMC Sierra HD interior, which show the center stack – along with several other components – almost entirely undisguised.
First, a few words about what we’re looking at: this is a refreshed Sierra HD in the Crew Cab, Long Box configuration and the Dual Rear Wheel (dually) setup. The trim level is a bit of a guessing game at this point, but we are certain that it’s either the SLE or SLT, and not the base Pro (judging by the presence of various chrome bits on the body) or the range-topping Denali (going by the lack of the standard running boards and trim-specific wheels). Back to the interior. Under the hood is the 6.6L V8 L8T gasoline engine rated at 401 horsepower and 464 pound-feet of torque in the current Sierra HD.
The new center stack configuration looks similar, if not the same, to the one seen on the refreshed 2022 GMC Sierra 1500, with the infotainment system being an exact match for the 13.4-inch unit in the Sierra HD’s half-ton relative. Meanwhile, the button arrangement and HVAC controls below the dash seem to be in line with the SLE or SLT trims in the 2022 Sierra 1500.
It’s worth pointing out that this particular 2024 GMC Sierra HD prototype has the column shifter, a feature that was replaced by a console shifter on the refreshed 2022 Sierra 1500 with the front bucket seat configuration (models with the front bench seat retained the column shifter, for obvious reasons). It’s possible that this particular 2024 GMC Sierra HD prototype is also equipped with the front bench seat option, and that models with the front bucket seat setup will get the console shifter instead.
The 2024 GMC Sierra HD refresh is expected to bring a slew of updates and changes to Big Red’s big rigs in the form of restyled front and rear ends, an overhauled cockpit, updates to the powertrain, and a new Sierra HD AT4X model, as first reported by GM Authority last week.
As for the powertrain updates, we expect the refreshed Sierra HD to replace the GM 6-speed automatic transmission with its newer 10-speed counterpart for models equipped with the L8T gasoline engine, while the 6.6L V8 L5D turbo-diesel Duramax engine is expected to get a boost in power and torque to over 500 horses and 1,100 pound-feet of torque.
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