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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).

General Motors and EVs: No stranger to firsts, but where's the leadership?

2015 is already shaping up to be the year of "affordable, 200-mile EV" concepts. Nissan and Tesla have each been talking about them for some time, the latter promising to unveil its Model 3 at the North American International Auto Show in January before balking when the time came. Instead, Chevrolet beat them all by unveiling the Bolt concept at the same event, followed shortly thereafter with suggestions of a 2016 launch – potentially offering the first nationwide EV with anything close to that range. It was the ballsiest EV-related move General Motors has made in a quarter century. But will it remain so? Exactly 25 years before the Bolt rolled up onto the turntable, then-Chairman Roger Smith unveiled GM's last ground-up EV concept, the even-more-unfortunately-named Impact, at the Los Angeles Auto Show in January 1990. A few months later, he surprised most of his colleagues by announcing its intended production in honor of Earth Day. It was the first modern foray into electric vehicles for the US by any automaker, one that was rewarded by the State of California with what is now known as the Zero Emissions Vehicle mandate. The program not only forced other automakers into competing with Roger's pet project, but inspired all of them to fight it like small children against bedtime. Some years later, the drivers themselves weighed in, with a biting documentary about that obstinance and the leadership it cost both GM and the country. Within months, GM was first back into the fray of plug-in vehicles. Many criticized the company for starting with a PHEV rather than jump straight back into EVs. The choice wasn't totally out of the blue – even EV1 was meant to be followed by a PHEV. And especially on the heels of Who Killed the Electric Car?, some skittishness was understandable: even a successful EV would invite a "we told you so" public reaction, underscoring their mistake in ending the EV1 program. If a new EV didn't do well, they'd be convicted in the public eye as serial killers. All while seeking a federal bailout. For all the flak, the resulting Chevy Volt was and is a better car than GM has ever gotten credit for. But the company seemed to grow weary of having to overcome its varied past, and while the current owners remain happy, much of the stakeholder and community engagement that so effectively built early goodwill and sales growth faded not long after launch. Marketing has been spotty in both consistency and effectiveness.

There's an impending shortage of new trucks in America's heartland

URBANDALE, Iowa — Jerry Bill is worried the novel coronavirus could hurt business at the Des Moines auto dealership he runs, but not because of a shortage of buyers for the big Ram pickups on his lot. "Our biggest issue will be if we don't get more inventory," said Bill, general sales manager of Stew Hansen Chrysler Dodge Jeep Ram, which sells around 2,700 new vehicles a year in Urbandale, a suburb of Iowa's capital Des Moines. After a drop in sales in April when consumers stayed home, Bill expects pickup truck sales to end May similar to where they were a year earlier. And if demand remains strong, Bill said he will run out of popular models in June. Fiat Chrysler began slowly restarting Ram truck assembly lines on Monday after a two-month shutdown. The U.S. economy contracted in the first quarter at its sharpest pace since the Great Recession of 2007-2009 because of lockdown measures aimed at slowing the spread of the coronavirus. Economists warn the second quarter will be much worse. Still, far from the lockdowns of states like New York, Michigan or Ohio, dealerships like Stew Hansen have provided FCA and Detroit rivals General Motors and Ford a rare bright spot: strong sales of pickup trucks in America's heartland. Overall U.S. sales of cars and light trucks crashed to the weakest pace in 50 years last month. But sales of big Detroit brand pickups, particularly in southern and western states less affected by the outbreak, significantly outperformed the market, industry executives and analysts said. Pickup trucks are one of the most profitable automotive segments in the world. They account for a huge portion of the Detroit automakers' profits and formed a huge lure for Peugeot, which expects to merge with FCA by early 2021. The pressure is now on to boost pickup truck production and send vehicles to dealers in parts of the country with dwindling supplies. That is particularly true for GM, which is running short of certain truck models after losing 40 days of production to a strike last fall. "If you don't have what someone wants, they can choose to go to another brand," said Cox Automotive analyst Michelle Krebs. 'Easiest swap ever' Detroit automakers in March rolled out large discounts — such as interest-free loans for seven years — to keep vehicles rolling off dealer lots.