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GM exploring ways to raise half-ton Duramax diesel tow rating

Lots of truck owners cheered when GM announced fuel economy numbers for the 2020 Chevrolet Silverado with the 3.0-liter Duramax diesel inline-six. Even after Ram let loose its EPA mileage ratings for the 2020 Ram 1500 EcoDiesel, the Chevy oil-burner still took the trophy. The victory was years in the making, GM engineers spending an entire four-year development cycle refining the LM2 Duramax to increase mileage. The tradeoff, as well all know by now, is towing; the Duramax in half-ton duty pulls a maximum 9,300 pounds in the Silverado. Rivals across town can do more, the Ford F-150 PowerStroke rated at 11,500, the Ram 1500 EcoDiesel game to pull 12,560. GM engineer John Barta told Muscle Cars & Trucks that more hauling chops could be on the way, explaining, "We’re actually looking at upgrading some of the materials around (the engine bay) to see if we can maybe raise our tow rating." Engine bay materials are at issue due to thermal complexities underhood. John Barta, GM's assistant chief engineer of diesel engine controls, said the Duramax's inline-six configuration allowed engineers to get emissions hardware like the combined selective catalytic reduction, diesel oxidation catalysts, and diesel particulate filter unit closer to the engine, where it heats up quicker, getting emissions down quicker. But that filter puts another heat source in those confines, enforcing a cap on the tow rating to keep the engine and other systems from overheating. "If you look under the hood," he said, "youÂ’ll see a significant amount of silver ‘moon tapeÂ’ around to make sure things arenÂ’t getting overheatedÂ… if we were to go up in higher towing, which we can, we start impacting the possibility of deteriorating some of the components.” There isn't much space for more grille, so swapping for a better grade of "moon tape" or a different kind of material could reduce engine bay heat, extracting a higher tow rating in the process.  It's important to note a point Barta's been making for months about the Duramax figures, though. "Even though itÂ’s nice to brag about big numbers, in reality, light duty customers are not towing that large with their trucks," and, "We do know that (95 percent) of our light duty customers donÂ’t tow over 9,000 pounds." On our First Drive of the 2020 Silverado diesel we called out the tow rating, but emphasized that the Chevy and GMC have more important challenges to overcome.

2024 GMC Hummer EV SUV revealed, priced the same as the truck

Following up on the 2024 GMC Hummer EV pickup truck's big reveal back in October is the SUV variant. And it looks pretty much the way you would expect. From roughly the doors forward, it's the same as the blocky pickup. But the back half now has an enclosed cargo area, a full-door tailgate and full-size spare mounted to it. Besides the tweaked looks, the SUV is physically shorter. The full dimensions haven't been revealed yet, but the wheelbase is 8.9 inches shorter than the truck at 126.7 inches total. The overall length is likely reduced even further, since the tail is much shorter than the truck's with the rear wheels close to the bumper. Both of these changes will greatly improve breakover and departure angles, plus make the vehicle generally more maneuverable on and off road. GMC boasts that with four-wheel-steering, the turning circle is just 35.4 feet, about a foot and a half tighter than the truck. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Powertrains are identical to that of the truck. The EV2 and EV2X get two motors making 625 horsepower. Higher EV3X and Edition 1 trims have three motors making 830 horsepower. Electric range varies between about 250 miles to 300 miles depending on specification. Extremely fast 800-volt, 300-kW DC fast charging is available and included on all but the base trim level. An Extreme Off-Road Package is available on EV2X and above that adds 18-inch wheels with 35-inch mud-terrain tires. You'll also be able to get the ground-clearance-increasing air suspension and four-wheel steering with the famous Crab Mode. Super Cruise will be standard on every GMC Hummer EV. Pricing and trim levels are nearly identical to the pickup truck, with only the Edition 1 varying. The base model starts at $79,995, and each trim and price is listed below. Prices are listed without the destination charge because that figure has not been revealed yet. EV2: $79,995 EV2X: $89,995 EV3X: $99,995 Edition 1: $105,595 ($110,595 with Extreme Off-Road Package) The Edition 1 SUVs will be available first with sales starting early next year. The EV2X and EV3X will go on sale that spring, and the base EV2 trims will go on sale in spring 2024. GMC is taking reservations now, and they can be made at this link. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

2019 GMC Sierra Denali First Drive Review | The more things change...

ST. JOHN'S, Newfoundland — Canadians love their GMCs. Both anecdotal and statistical evidence supports this. In certain areas of Canada, the Sierra outsells the Chevy Silverado. But in this area of Canada, Cape Spear, the morning fog and salt air are thick. This is the most eastern point in Canada, and the most eastern point of North America if you don't count Greenland. We woke up early and drove to the coast in the new 2019 GMC Sierra Denali, hoping to catch what was promised to be an absolutely spectacular sunrise. The sunrise was a no-go thanks to the fog, turning the sky into a grey mist that melted into the Atlantic. Still, if the world had an edge, this is what it would look like. Driving in an inspiring place like this invites introspection, and since we're in an GMC Sierra, why not examine the brand's place in the world? Recall that for years, a GMC showroom was just packed with slightly more expensive versions of other GM products. Badge engineering, if you will – a dirty word in our business, applied to such notable machines as the Cadillac Cimarron, Buick Terraza, Chevy Aveo and Saab 9-7X. Things, at least on the surface, seem to be changing. GMC says it's making a concerted effort to differentiate its product portfolio from the rest of GM, but the results have been mixed. The brands were supposed to have less product crossover. There's no GMC version of the Chevy Traverse and, initially, there was no Chevy equivalent of the GMC Acadia, though the new Blazer kills that advantage. The Equinox and Terrain are still basically the same vehicle, as are the new 2019 Silverado and 2019 Sierra. At least the two trucks look decidedly different. There's still a family resemblance, but most of the bodywork has been changed. Where the 2019 Silverado adopted some curves, the Sierra stuck with straight lines. Compare things like the headlights, wheel wells and doors. The Sierra still has a massive grille and — aside from the AT4 off-road trim — packs on as much chrome as a 1958 Cadillac, but that's what customers want these days. The Ford F-150 and Ram 1500 are no different in this regard, packing lots of chrome, hard edges, and frontal areas that would give passenger trains a run for their money. At first glance, you'd be hard pressed to tell the Sierra and Silverado's interiors apart from both each other and the outgoing models. It's basically the same design, though the Sierra makes do with some slightly nicer materials.