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GM's redesigned full-size 2021 SUVs face delay over coronavirus

As General Motors works to conserve cash for the coronavirus pandemic, the automaker reportedly told suppliers that it is postponing development of several future vehicles. The situation may cause GM to delay the launch of the 2021 Cadillac Escalade, GMC Yukon, Chevrolet Tahoe and Chevrolet Suburban SUVs, which had been planned to roll out in April. The original launch plan for the redesigned full-size SUVs, which are some of the most profitable vehicles produced by GM, had called for production of the current models to end at its plant in Arlington, Texas, this week. After a retooling process, the redesigned SUVs were slated to begin production late in the month of April. In an email to suppliers viewed by Reuters and confirmed as authentic by GM, the automaker also said it was suspending development work on six future vehicle programs, including updates of the Chevrolet Equinox, GMC Terrain, Cadillac XT4, Bolt EV, Chevrolet Silverado and GMC Sierra. GM said preproduction work on those programs would be pushed back to calendar year 2021, with most of the updated vehicles scheduled to be launched as 2022 models. According to the Detroit News, work has also been paused on the Chevy Camaro and a future version of the Corvette that has yet to be unveiled and wasn't planned for production during the 2020 calendar year. Last week, the automaker told employees and suppliers it was delaying work on some future vehicles while pushing ahead with near-term models such as its redesigned full-size SUVs and the GMC Hummer EV, Cadillac Lyriq, Chevrolet Bolt EUV and Cruise Origin, as well as its new Ultium battery system. A GM spokesman who spoke with Reuters reiterated on Monday what the automaker had said last week — that the situation with its U.S. plants was "fluid" and that the automaker would "continue to evaluate" whether and when to reopen those plants on a week-by-week basis, with "employee safety" guiding that decision. GM said previously that it was closing most of its U.S. plants indefinitely. In its Monday email, GM asked suppliers to stop work on all pre-production tooling and pre-production parts manufacturing, but also not to dispose of any tooling or materials. GM told Reuters it had solicited volunteers from its workforce to finish the build-out of the current SUVs on a single shift in Arlington.

GM patent reveals new two-stage turbocharger

Modern turbochargers may be some of the best ever made, but performance is something that engineers are always trying to improve. According to GM Inside News, General Motors (GM) is hoping to alleviate some of the negative aspects of a two-stage turbocharger setup with a newly-patented design. The patent, that was filed on May 19, 2016, reveals a clever bypass system that allows the engine, a four-cylinder unit, to optimize both the low-pressure and high-pressure inlets for its respective functions. According to the filing, a conventional two-stage turbocharger setup is engineered to allow both turbines to operate simultaneously at low and mid engine speeds. At high engine speeds, only the low-pressure turbine works. The setup can't isolate either the low or high pressure side, which can impair low-end performance. GM's new two-stage turbocharger setup looks to eliminate this by linking the high-pressure turbo to the exhaust manifold through the high-pressure inlet duct. The low-pressure turbo is attached to the high-pressure turbo by a low-pressure inlet duct, which is linked to a connecting channel. A single actuator that is housed in the exhaust manifold creates a bypass that can opens the high-pressure inlet or close the connecting channel. Depending on what the engine load and speed is, the ECU guides the actuator—a single rotating spindle with discs corresponding to flanges on the high and low pressure sides—to isolate one of the two turbos. Isolating the turbos allow the respective inlets to be engineered for the best possible fluid dynamic performance. The setup should increase performance and decrease lag. There's no word on what car this setup will make an appearance on, but it will most likely be used in premium vehicles before trickling down to the rest of GM's vehicles. Related Video: News Source: GM Inside News, AutoGuide via GM Authority Cadillac Chevrolet GM Technology Sedan turbo patent engine turbocharging

Cadillac gives enthusiasts an early look at its next high-performance sedans

Cadillac will introduce a pair of sport sedans named CT4-V Blackwing and CT5-V Blackwing, respectively, at 7 p.m. Eastern today (February 1). While car companies routinely drum up excitement for new models by releasing tightly-cropped or blacked-out images, Cadillac surprised us with a photo, and a TV spot that aired during the Rolex 24 at Daytona, that shows both cars in their entirety. Somewhat confusingly, the CT4-V and the CT5-V are not direct replacements for the ATS-V and the CTS-V; they're mid-range models, and they're powered, equipped, and priced accordingly. It's these flagship Blackwing variants that will pick up where the last-generation Vs left off with a significant bump in power, numerous chassis tweaks, and a more aggressive-looking design. They'll arrive in showrooms in time for the 2022 model year. Blackwing drivers won't draw unnecessary attention to themselves, because the visual changes are relatively subtle. Riding on model-specific wheels, the CT4-V Blackwing gains bigger air intakes on the front end, vents punched into the fenders, and a low-key body kit that adds a front splitter, front winglets, and a trunk-mounted spoiler. Cadillac gave the CT5-V a similar treatment, and it mounted the rear wheels on surprisingly wide tires. Cadillac pointed out the Blackwing sedans benefit from the world's fastest-reacting suspension system. It's likely the fourth evolution of its magnetic ride control technology, which it detailed in October 2020.  While full specifications remain under wraps until the duo's unveiling, we know that both sedans will be available with a six-speed manual transmission. It's reasonable to assume that an automatic (likely the familiar 10-speed) will be offered as well. As for what's under the hood, our crystal ball tells us that the CT5-V will land with a V8 engine, though it won't be the short-lived twin-turbocharged Blackwing unit that gave both cars their name. Enginers might have selected an evolution of the CTS-V's 6.2-liter. As for the CT4-V, it will receive the ATS-V's 3.6-liter turbocharged V6. Both models will be exclusively available with rear-wheel-drive. Enthusiasts who want to secure an early built slot will have the chance to reserve a 2022 CT4-V Blackwing or a 2022 CT5-V Blackwing by visiting Cadillac's website shortly after the sedans are unveiled on February 1. As we previously reported, the first 250 units of each car will wear a numbered plaque on the steering wheel.