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2024 GMC Sierra HD unveiled with new design and more powerful turbodiesel V8

The 2024 Chevrolet Silverado HD made its debut in September 2022, so it was only a matter of time before the GMC Sierra HD received a similar round of updates. Unveiled online, the truck gains a new-look design and a more powerful turbodiesel V8, among other changes. GMC developed the Sierra HD primarily for towing and hauling so the most significant changes are found under the hood. The available 6.6-liter turbodiesel Duramax V8 engine now develops 470 horsepower at 2,800 rpm and 975 pound-feet of torque at 1,600 rpm, figures that represent increases of 25 and 65, respectively, over the 2023 model and that match the 2024 Silverado HD's. GMC notes it increased low-end torque by about 25% by fitting a new turbocharger. The V8 spins the rear or the four wheels via a 10-speed automatic transmission.  On the gasoline side of the spectrum, the 6.6-liter V8's output stays flat at 401 horsepower and 464 pound-feet of torque. It's now bolted to a 10-speed automatic transmission, and replacing the 2023 truck's six-speed lets the engine run closer to its peak power for longer periods. Here again, rear-wheel-drive comes standard and a part-time four-wheel-drive system is available across the entire line-up. Properly equipped, the 2024 Sierra 2500 HD Crew Cab can tow up to 21,900 pounds. The standard 2500 HD's towing capacity checks in at 22,500 pounds (a 4,000-pound improvement), and the 3500 HD is capable of towing up to 36,000 pounds — that's nearly 13 Subaru BRZs. Buyers have a dizzying selection of trim levels and body styles to choose from. The range includes Regular, Extended, and Crew cabs as well as seven trim levels called Pro, SLE, SLT, AT4, AT4X, Denali, and Denali Ultimate, respectively. The AT4X variant will not be available at launch, and the Denali Ultimate is new for the 2024 model year. Additionally, 3500 HD models can be ordered with dual rear wheels. What the truck looks like depends on the trim level. Broadly speaking, designers drew a more angular front end with a new-look grille, sharper-looking lights, and a redesigned bumper. New wheels are part of the update as well; the 3500 HD dually gets 18-inch polished aluminum wheels, and 22-inch units are optional on single-rear-wheel trucks. Finally, the color palette grows with six optional shades called Titanium Rush Metallic, Sterling Metallic, Volcanic Red Tintcoat, Redwood Metallic, Meteorite Metallic, and Downpour Metallic, respectively.

2019 GMC Sierra Denali Drivers' Notes Review | Half measures

Associate Editor Reese Counts: This truck feels a full generation behind the competition. It's a half measure that feels more like a mid-cycle refresh than a whole new truck. There are a few high points: the 6.2-liter V8 is great (if thirsty) and the bed is wider than anything else in the class. The tailgate, too, is nifty, though some might write it off as a novelty. I also dig the tech, particularly the infotainment system and heads-up display. Ram might brag about its giant touchscreen, but I think I actually prefer the GMC's user interface. The rest can be summed up with a series of shoulder shrugs. The Sierra finally looks different than a Silverado, but I wouldn't call it handsome. The interior is spacious, but I'd knock the design and materials in a $45,000 truck, much less one approaching $70,000. It's not Toyota Tundra levels of terrible, it's just plain, cheap, and not nearly as space efficient as the Ram. It feels like GM's not even trying to move the needle with this truck. The more time I spend behind the wheel, the less I like it. Assistant Editor Zac Palmer: I got to spend a lot of seat time in this 2019 GMC Sierra Denali, and I came away generally unenthused by GM's most luxurious truck. We harp a lot about how expensive pickup trucks are these days, and this one's near $70,000 price tag is just the same. When you step inside a similarly-specced Ram, it feels like it's worth its price. When I step out of a Silverado and into a more expensive Sierra, I want to feel like it's money well spent. This Sierra Denali does not. Beyond the leather seats and a few small pieces of wood trim, it's hard, black plastic galore. What makes it all the more frustrating is that GM has most of the tech and features it needs (solid infotainment, 360-degree camera, wireless phone charging and the rear camera mirror is genuinely awesome). The presentation just comes off as dated from the start. It's a shame, because I have a strange affinity for how this truck looks from the curb. The sharp angles, brash styling and "tough truck" attitude is appealing to me. I like stomping on the gas and letting the 6.2-liter torque monster under the hood loose. But man do you pay the price for using that engine. Over a few hundred miles of driving I ended at a dismal 15 mpg reading on the trip computer — the saddest part of this was knowing these were mostly highway miles.

GM's MPG overstatement could affect 2 million vehicles

Late last week, GM admitted that three of its large SUVs fuel economy window stickers did not match their actual efficiency ratings, and so the vehicles couldn't be sold. The stickers on the 2016 Chevy Traverse, GMC Acadia, and Buick Enclave said their ratings were one to two miles per gallon better than they should have been. Officially, the number of affected vehicles sits at about 60,000. But Consumer Reports makes a good point: what's up with all of the previous model year SUVs that are basically the same vehicle? To wit: the 2016 model year vehicles are not substantially different than the 2015 or the 2014, or even going all the way back to 2007. On the EPA's fuel economy website, all of these older models will "have better stated fuel economy numbers than the new vehicles in GM's dealerships," Consumer Reports noted. CR's best point, and the one that makes the 60,000 number potentially grow to 2 million if all of the vehicles built on this platform are affected, is that "[i]t seems unlikely that the company would change the powertrain on these carryover models so late in their model cycles in a way that would cause a dramatic, negative impact on fuel economy." GM says that earlier model year SUVs are not affected and the EPA did not respond to CR's question about the potential for more discrepancies. We've seen automakers reverse course before, so if GM has to come out with a mea culpa soon, don't be surprised. GM is rushing corrected stickers to dealers so that the SUVs can be sold again, but a fix for the already-sold vehicles could be trickier to solve. Related Video: Related Gallery 2013 GMC Acadia View 16 Photos News Source: Consumer Reports Government/Legal Green Buick Chevrolet GMC Fuel Efficiency mpg gmc acadia chevy traverse