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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.

GMC Hummer EV will weigh 9,046 pounds

In the 2000s, Hummer's unique breed of off-roaders summoned a dark cloud of disapproval from environmentalists because they were gas-guzzling SUVs with mammoth dimensions. GMC's born-again Hummer EV will escape the gas guzzler label by running solely on electricity, but it will be even bigger and much heavier than its predecessors. Enthusiast site GM-Trucks reported the Hummer EV will tip the scale at 9,046 pounds (4,103 kilos if you're outside of the United States) in its quickest configuration, and a GMC spokesperson told Autoblog that figure is accurate. For context, the H1 Alpha released for 2006 (and often considered the ultimate Hummer) weighed 8,113 pounds, the H2 checked in at 6,614 pounds with the 6.2-liter V8, and the H3 was comparatively light at 4,600 pounds. When it lands, the Hummer EV will be one of the heaviest new cars sold in the United States. Part of its plumpness can be attributed to its colossal dimensions; it measures 216.8 inches long, 86.7 inches wide, and 81.1 inches tall. In comparison, the H1 stretched 185 inches long, 87 inches wide, and about 78 inches tall. The electric powertrain also played a major role in slinging the Hummer's weight into dually pickup territory. Batteries are heavy, and the Hummer EV's Ultium pack reportedly has a capacity of over 200 kilowatt hours. It has three electric motors, too. Note the 9,046-pound figure applies only to the sold-out Launch Edition model, which will offer 1,000 horsepower, the aforementioned 200-kilowatt battery, and the supercar-like ability to hit 60 mph from a stop in three seconds. GMC will launch cheaper, slower, and presumably considerably lighter variants of the truck in the early 2020s. Although SUVs are often heavier than comparable trucks due to the additional sheet metal, the people-hauling Hummer should weigh less than the cargo-carrying variant. As we reported in April 2021, its output will be limited to 830 horsepower because it's 20 inches shorter than the truck, and the bigger battery pack doesn't fit in this footprint.

Autoweek dubs GMC Canyon, VW GTI its 2015 'Best of the Best'

For kids around the globe, tis the season for Santa, reindeer and presents. For the automotive industry, the last quarter of each year is reserved for awards, whether they come from Motor Trend, Car and Driver, Automobile, or yes, Autoblog. The latest to get released comes from our friends at Autoweek. The magazine has echoed other outlets, naming a Volkswagen hatchback and a small pickup from General Motors as its Best of the Best. Unlike Motor Trend, which handed out its golden calipers to the Chevrolet Colorado and Volkswagen Golf range, Autoweek doled out its awards to the Colorado's twin, the GMC Canyon, while singling out the hottest version of the Golf, the GTI. "This is the best hot-hatch on the American market – and it may be the best car you can buy for less than $30K," one AW staffer said in the publication's article on the feature. Other staffers praised the absolute value provided by the GTI and the overall fun factor. The Canyon, meanwhile, was saluted for being "the perfect size," not to mention its excellent build quality, feature-rich cabin and overall practicality. "It's truly a truck in the most honest sense of the word," Autoweek wrote of the Canyon. Scroll down for the full press release on the announcement from Autoweek, which includes comments from both Volkswagen and GMC. And then head over and read AW's full feature on the awards. Autoweek names Best of the Best/Car and Truck for 2015 Volkswagen Golf GTI and GMC Canyon signal a strong year for design, performance and value DETROIT, Dec. 16, 2014 /PRNewswire/ -- Today, Autoweek named the Volkswagen Golf GTI as its Best of the Best/Car for 2015, beating a group of finalists that includes the Alfa Romeo 4C, Ford Mustang and Mercedes-Benz C-class; and the GMC Canyon as its Best of the Best/Truck for 2015, besting the likes of the Chevrolet Colorado, Lincoln MKC and Porsche Macan. Autoweek evaluates every new or significantly updated model throughout the year and begins to identify the standouts. Performance, economy, fit and finish, design, value, significance to the auto industry and personal taste all combine to define the Best of the Best. Four cars and four trucks make the grade, and Autoweek editors put them through rigorous road-handling tests at Michigan International Speedway in Brooklyn, Mich. This is where a vehicle transcends the numbers and shows if design, performance and pure driving passion meld into an Autoweek Best of the Best pick.