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GM Defense shows Hummer EV-based military truck concept

GM Defense wants to convince the U.S. military that it has even more of what the military needs. During this week's Modern Day Marine 2023 exposition in Washington, D.C., GM Defense showed a new tactical vehicle concept based on the GMC Hummer EV platform. Called the Electric Military Concept Vehicle (eMCV), it uses the same Ultium platform and drivetrain as the retail Hummer EV. That means a 200-kWh battery (usable) powering three motors making 1,000 horsepower, with the two motors in back capable of torque vectoring, the single motor in front fitted with a locking diff. Upgrades over the dealership version include Fox shocks working larger 37-inch tires and heavy-duty brakes. The redrawn front and rear bumpers improve approach and departure angles. The tube chassis and lack of body panels would shed some of the Hummer's prodigious weight, nevertheless, range is reduced as a result of the other mods that reduce aerodynamic efficiency. Among said mods to the six-seater is a 46-inch gun ring and a swing side-arm mount when it's time to clock in. The estimated range drops to 300 miles from the 329 on the retail Hummer EV. Being mostly electric – more on that in a moment – the eMCV has features Silent Drive and Silent Watch driving modes could get fighters on-station with minimal noise.Plugged into a fast charger capable of 350 kilowatts, GM Defense says 12 minutes gets 100 miles of range. But when silence isn't a necessary factor, this is a series hybrid. GM Defense added a 12-kW diesel generator that can provide "limited charging and propulsion," which could also help charge "mission-critical equipment." A while back, the Army purchased a commercial Hummer EV for evaluation. The military didn't request this new concept, a GM Defense spokesperson telling Defense News it was built as a sign of potential. "We're trying to showcase what is in the realm of the possible just so we can get the discussion going and help shape [the military's] future requirements," the spokesperson said. "They get to see the different sizes and how to customize it, the different options." The eMCV sat on the trade show floor next to GM Defense's All-Electric Military Concept Vehicle, a Chevy Colorado-based Infantry Squad Vehicle (ISV) powered by a 60-kWh battery juicing an e-crate motor with 200 hp and 266 pound-feet of torque. The eISV was also built as a demonstrator without military input.

GM 8-speed transmission lawsuit granted class action certification

A story on Autoblog about potentially faulty 8-speed automatic transmissions from General Motors in 2019 has, as of the day this was published, 166 comments, mostly from owners of cars and trucks who say they are experiencing "a hesitation, followed by a significant shake, shudder, jerk, clunk, or 'hard shift' when the vehicle's automatic transmission changes gears." At the time, lawyers were seeking statewide classes in at least six states. As of today, the Detroit Free Press reports that a judge has granted class action status to a lawsuit brought by 39 plaintiffs across 26 states covering the transmission issue. The lawsuit specifically applies to vehicles that are equipped with GM's 8L90 or 8L45 8-speed automatic transmissions made between 2015 and March 1, 2019. Both of these transmissions are similar units, the 8L45 being slightly lighter version used in fewer vehicles than the beefier 8L90, and are designed for front-engine, rear- or all-wheel drive applications. The lawsuit alleges that the erratic transmission behavior makes some vehicles unsafe to drive. Ted Leopold, partner at Cohen Milstein and the court-appointed lead counsel for the case, said in a statement, "General Motors knowingly sold over 800,000 eight-speed transmission vehicles, which they knew to be defective for years, and yet made the business decision not to tell its customers before purchase." He added, "Dealers were directed to tell the customers that harsh shifts were ‘normal' or ‘characteristic.Â’ Such decision making is both highly irresponsible and emblematic of what GM believes it can get away with." The vehicles included in the court order with potentially faulty transmissions includes: 2015-2019 Chevrolet Silverado 2017-2019 Chevrolet Colorado 2015-2019 Chevrolet Corvette 2016-2019 Chevrolet Camaro 2015-2019 Cadillac Escalade and Escalade ESV 2016-2019 Cadillac ATS, ATS-V, CTS, CT6, and CTS-V 2015-2019 GMC Sierra, Yukon, Yukon XL, and Yukon Denali XL 2017-2019 GMC Canyon Some additional details of the lawsuit can be found at the Cohen Milstein site, including claims that "since 2015, GM has issued thirteen versions of a “technical service bulletin,” or “TSB,” related to this shifting issue alone." The statement from Cohen Milstein says that a "second action regarding GM vehicles with 8L transmissions is also underway in Battle v. General Motors, LLC, 2:22-cv-108783.

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