GM Authority spy photographers have captured a rather interesting set of photos showing a refreshed 2024 GMC Sierra Denali HD prototype towing a current Chevy Silverado HD on public roads in Michigan.
The refreshed GMC Sierra HD is currently under development and, as GM Authority reported previously, will go on sale for the 2024 model year. These updates will include revised exterior styling, including new front and rear fascias with new lighting elements. We expect these styling revisions to loosely follow those applied to the refreshed 2022 GMC Sierra 1500, which made its official debut earlier this year.
Inside, we expect the refreshed 2024 GMC Sierra HD will introduce a new, more upscale cabin layout with new available display screens – as evidenced by prototype models spied in the past. This will include the introduction of a new 13.4-inch central infotainment screen, which will be mounted above a horizontal hard-button arrangement. GMC customers can also expect a greater mix of high-end materials in pricier trim levels, along with additional soft touch points.
The refreshed 2024 GMC Sierra HD will replace the aging GM six-speed automatic transmission with the newer 10-speed for units equipped with the naturally aspirated 6.6L V8 L8T gasoline engine, while the 6.6L V8 L5P turbodiesel Duramax engine will get a boost in output to 1,100 pound-feet of torque and more than 500 horsepower.
It seems likely this Sierra Denali HD prototype towing this model was undergoing powertrain tests for calibration, with the red Chevy Silverado HD LTZ test vehicle serving as a convenient and accessible way for GM engineers to mimic a more typical load for an HD truck. It’s worth noting this isn’t the first time we’ve caught GM testing its HD trucks in this way – we spied engineers testing a similar setup with a Chevy Silverado HD prototype back in April.
There’s still lots more to learn about the refreshed 2024 GMC Sierra Denali HD and the rest of the Sierra HD lineup between now and the truck’s debut in 2023, so be sure to subscribe to GM Authority as we bring you the latest GMC Sierra news, GMC news, and around-the-clock GM news coverage.
Comments
Everything looks ready. Apparently whatever change they did to the Dmax is taking a long time to get ready for final production. Hopefully it’s an impressive improvement
It could just be the manufacturing process of the camo covering, but it seems there is a cutout flap for a second fuel door on the right side of the bed.
One can dream, right?
So they can use the same cover on both sides of the truck… that or the driver’s going to be annoyed the next time it needs fuel.
You never put fuel fillers on both sides because one, that would involve the filler going over the exhaust creates a fire hazard if there’s a leak, two, it would be a complete hassle to fill up anywhere that’s not a truck stop.
Try that with an E truck.
I’m curious so a recall on the Dmax however here they are testing one
Who loaded that dually? You never EVER load a vehicle on a trailer with the heavy end to the rear even if it is a gooseneck / 5th wheel. (4 million miles commercial experience) even portable parking lots don’t load vehicles backwards.
Your right Ted. However look at the squat of the tow vehicle. There’s no way the back of that Chevrolet truck is empty.
It doesn’t matter if the drive axle is maxed out. If the trailer tail is heavier than than the front it’s a dangerous situation waiting to happen. Ever see a set of doubles wobble? It because the back of the load is heavier than the front. Been there done that with sealed loads and it’s nerve wracking at the least and scary when it goes south.
The truck on that trailer is loaded wrong, period . but if they turned that truck around , the SRW GMC bumper would be on ground. LMAO , GM is a total joke anymore. stupid @ss looking mirrors , and GOOFY Gayle above is hoping for Fuel filler necks on boths sides of the bed , yea that would be fun in fuel lanes
Not everyone uses fuel lanes. Talk to someone that grows your food on farms. We have bulk fuel. Yes, when you buy a tanker at todays prices it hurts, but you don’t need to drive 50 miles for fuel. If the old trucks had them, why can’t new generations?
One can dream, without having a second tank in the bed.
Disney is a place to dream, while mickey and Goofy are charging up the wazoo and there chasing Brandon, warren and the squad. Farmers are great people , but are being pushed out of business by costs , but I’m very sure there not sitting around the house dreaming of right side filler necks on there trucks, I bet there wanting Diesel back down to 3.00 a gallon and not 5.70 thanks to Brandon and AOC and dreamers.
Diesel in canada is averaging $2.45/ Liter… with the exception of fleet owners, no one else isn’t going to be buying these. Canada is also set a nee Pickup and SUV tax. Liberals hard at work.. raising taxes to give to other countries