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'Killing a Duramax' Gale Banks YouTube series methodically tunes a diesel to death

Learning or perfecting a skill by watching YouTube videos is known as attending YouTube University. GM Authority picked up on one of the video site's more fascinating courses, hosted by Gale Banks; in a fair world, he should be referred to as Professor Banks when it comes to diesel engines and truck tuning. A few months after GM introduced the updated L5P 6.6-liter Duramax diesel V8 in the 2020 Chevrolet Silverado HD and GMC Sierra HD that ships with 454 horsepower and 910 pound-feet of torque, Banks decided he wanted to methodically tune the engine to death. The purpose of the resulting series, called "Killing a Duramax," is to push more power out of the engine in order to discover which parts break and when — or, as Banks puts it, force-feed the Duramax "until the crank hits the street and the heads hit the hood." With that knowledge, Banks can figure out all the weak points on his way to building what he calls a "Superturbo," that being a supercharged, twin-turbo race engine with more than 1,000 hp. What makes the series fascinating is Banks' knowledge, paired with the company's comprehensive iDash engine monitoring system that keeps tabs on a glut of parameters every step of the way. So for instance, you get Banks explaining the differences between inches of mercury and barometric pressure, how those are different from the water content of the air measured in grains, then showing those readouts on the iDash, then explaining in detail how they affect the air density in the Duramax system. The stock Borg-Warner variable turbo gets a lot of airtime — Banks accuses it of being "out to lunch" because he feels it's the weakest link on the engine. That turns into a turbo teardown and a deep explanation of performance pitfalls, such as when air pressure on the turbine begins to diverge from the boost pressure coming from the compressor. Banks says he can keep close tabs on where power's coming from, because the iDash monitors the horsepower contribution provided by the ambient air, the turbo, and the intercooler separately. The major changes so far are a stouter Precision 7675 turbo and TurboSmart wastegate (episode 5), a twin intake (episode 6), a custom liquid-cooled intercooler from a marine engine, a new GM oil cooler and synthetic oil (episode 10), and new injectors (episode 11).

GM laying off more than 4,000 workers Monday morning

According to reports from Automotive News, The Detroit News, and CNN, General Motors plans to begin laying off more than 4,000 salaried workers starting Monday morning. In a statement to AN, a spokesperson for the automaker said, "We are not confirming timing. Our employees are our priority. We will communicate with them first." We've been expecting layoffs at General Motors since November, 2018. At the time, the Detroit-based automaker announced it would seek to shed 8,100 salaried employees, shut down five assembly plants in North America, and kill off several slow-selling models. One month earlier, GM offered buyout packages to 18,000 workers and said it would seek to cut its global workforce by 25 percent. A spokesperson said at the time the moves were "proactive steps to get ahead of the curve by accelerating our efforts to address overall business performance." The cost-cutting moves are expected to save GM up to $2.5 billion in 2019 and as much as $6 billion by 2020. David Kudla, CEO and chief investment strategist of Mainstay Capital Management, referred to the impending culling as "Black Monday" and told The Detroit News that the layoffs would begin around 7:30 a.m. and continue in waves throughout the coming days and weeks. GM plans to deliver on its fourth-quarter and full-year 2018 earnings report on Wednesday. President Donald Trump plans to deliver the annual State of the Union address a day earlier on Tuesday. We expect to hear plenty more from both sides over the next several days.

2023 GMC Hummer paint choices are out of this world

The 2022 GMC Hummer EV Edition 1 came in one color: Interstellar White. Despite production issues potentially pushing Edition 1 builds into the 2023 model year, the Edition 1 will stick to being bathed in that single brilliant shade. GM Authority says it got access to the color palette on the way for the standard series Hummer EVs due next year that shows seven new galactic-themed choices on the way. Interstellar White carries on, joined by Void Black as the only no-cost colors. The others are: Afterburner Tintcoat, said to be an orange hue; Deep Aurora Metallic, said to be some kind of bronze; Meteorite Metallic, said to be a gray; Moonshot Green Matte, which we've seen on early shots of the Hummer EV SUV; Supernova Metallic, said to be dark blue; Tide Metallic, said to be a different shade of blue. GMA didn't get intel on pricing for the cost-extra colors; right now, the most expensive palette option for GMCs is White Frost Tintcoat for $1,095. However, the outlet believes Moonshot Green Metallic will be "extremely limited" and charge a super premium price. If that ends up being the case, it suggests GM has a thing about getting big green for special greens. Cadillac made Dark Emerald Frost a late option on the 2022 CT4-V and CT5-V Blackwings and charged $3,925 for the matte paint job. The brand ended production of Dark Emerald Frost in January, making the color doubly exclusive since it was offered for less than a year at the same time as customer demand far exceeded the number of Blackwings available. Anyone wanting Moonshot on their Hummer should get in line early.  The 2023 GMC Hummer EV will begin production later this year. Last month, GM raised prices for the coming model year by $6,250, and raised the destination fee to $1,995. For the moment, that makes the Hummer EV 2 start at $86,245, the EV 2X at $96,245, and the EV 3X at $106,245. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.