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Leak reveals GM's 2017 heavy duty diesel trucks to get 910 lb-ft of torque [UPDATE]

UPDATE: Chevrolet officially announced specs for the 2017 Silverado HD and the rumors were true. The truck's new Duramax 6.6-liter turbo-diesel V8 puts out 445 horsepower and 910 pound-feet of torque. Chevrolet says the new motor produces 19 percent more torque and 12 percent more horsepower, while producing 35 percent fewer emissions. Overall, the new engine is a big improvement over the current motor, which generates 397 horsepower and 765 pound-feet of torque. According to Truck Trend, GM's newest heavy duty pickup trucks will pick up quite a bit more power and torque. The publication spotted a recent GM Powertrain ordering catalog that had the engine specs for the 2017 model year and managed to get some screenshots before the catalog was taken down, and they can be viewed here. The screenshots revealed that the 6.6-liter turbodiesel V8 powering the Silverado and Sierra heavy duty models will boast 445 horsepower and 910 lb-ft of torque. This is a substantial gain over the current models' 397 horsepower and 765 lb-ft of torque, and as Truck Trend points out, it exceeds the Ford Super Duty line's horsepower output of 440, but comes short of the 925 lb-ft rating. Truck Trend credits part of this output gain to the new intake system GM will introduce on the 2017 heavy duties. The intake gets 60 percent of its air from a scoop on the hood, with the other 40 percent coming from behind one of the front fenders. GM doesn't reveal horsepower figures in the press release about the scoop, but it does say the cooler air helps with maintaining the engine's output, and that the scoop does produce a ram-air affect, providing more air at speed. As we know, more air plus more fuel equals more power, but there's likely more to the power increase in this engine than only the intake. Related Video: News Source: Truck Trend via MSN Chevrolet GM GMC Truck Diesel Vehicles

GM confirms 2015 Silverado, Sierra to get 8-speed automatic

When viewed alongside the next Ford F-150 and the Ram 1500, there is one thing that seems to be missing from the Chevrolet Silverado and GMC Sierra. Where the F-150 will rely on turbocharging and aluminum architecture and the Ram sports an eight-speed automatic and an air suspension, the General Motors twins lack a big, calling-card feature. They're very good, very refined trucks, but one could argue that they're not terribly innovative.
And while it might not be as flashy a feature as air suspension or a lightweight skin, the Silverado and Sierra will get their own eight-speed automatic for 2015, a transmission that will be paired with the company's Ecotec3 6.2-liter V8. The new cogswapper will also find its way into the GMC Yukon Denali, but for now, there's no indication why the Cadillac Escalade, Suburban, Tahoe and standard Yukon are being left out.
According to GM, the new gearbox is about the same size and weight as the current Hydra-Matic 6L80 six-speed. By the time the new powertrain combination enters production late this year, the EPA will almost certainly have gotten around to certifying the vehicles' fuel efficiency. Until then, feel free to speculate. The current Silverado with the 6.2 and six-speed auto returns 14 miles per gallon in the city and 20 on the highway. How much do you think the eight-speed will improve those figures? Scroll down for the official press blast from General Motors, and then head into Comments.

Hummer EV to be sold at only about half of GMC dealerships

The new 1,000-horsepower Hummer EV will be sold under the GMC brand, but you won't find it in every GMC showroom. Currently, just about half of GMC's dealers have agreed to take on the electric truck, Buick GMC VP Duncan Aldred told investors on a conference call last week. According to Muscle Cars and Trucks, there are a number of reasons for the irregular availability. For one, there's the cost of upgrading dealerships to sell and service a fully electric vehicle. Stores would need to be upgraded with charging stations, and service centers would require new tools and training to work on an EV. Then there's the customer experience. At $112,595, the initial Hummer EV Edition 1 caters to a different clientele than the traditional GMC truck. The planned EV3X trim level that arrives in late 2022 and EV2X arriving in spring 2023 will start at just below $100,000 and $90,000, respectively. Some sellers believe that customers paying six figures for a vehicle will expect certain niceties that will necessitate showroom upgrades as well. Complimentary doughnuts, at least. Furthermore, not all GMC dealerships are located in areas with customers willing to shell out that much cabbage for a new vehicle, especially an EV. An $80,000 base trim will be available in 2024, so perhaps more dealers will be willing to take on the truck by then. Finally, there's the Hummer EV's no-haggle pricing. Aldred was adamant on the call that customers see the same price on the internet as they do on the paperwork. It's part of the premium dealership experience that GMC wants to provide for its well-heeled clientele. Still, GMC appears to have no problem moving all the Hummer EVs it can build. Even with its lofty price tag, all Edition 1 trucks were sold out 10 minutes after GMC's announcement. Related Video: