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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).

Handful of 2022 GMC Hummer EVs recalled for malfunctioning taillight - Updated

[Update: A GM spokesperson reached out to let us know that all customer vehicles have already had this recall addressed.] GMC announced this morning that its gargantuan new electric Hummer is the subject of its first recall campaign. It's a small campaign — approximately 10 units — but a nonetheless important one, as GM says a software glitch can cause its taillights to behave erratically, by either illuminating when they shouldn't or by failing to illuminate when commanded.  "Taillight software can cause one or both rear taillights to become inoperative, or remain fully or partially illuminated," GM's report said. "If a taillamp remains fully or partially illuminated, some or all of these taillamp functions will remain activated at all times, even after the vehicle is turned off, A taillamp that fails to illuminate or illuminates incorrectly may reduce the visibility of the vehicle or communicate incorrect information to other road users, increasing the risk of a crash." GM's description of the number of potentially impacted units is inconsistent between documents submitted to NHTSA. Some say nine units; others say 10 or 11. Regardless, it's a small number and all vehicles in customer hands have already been fixed. The remedy was a simple one; the tail lights themselves merely needed to be replaced and everything should behave just fine. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Full-size trucks are the best and worst vehicles in America

You don’t need me to tell you that Americans love pickup trucks. And the bigger the truck, the more likely it seems to be seen as an object of desire. Monthly and yearly sales charts are something of a broken record; track one is the Ford F-Series, followed by the Chevy Silverado, RamÂ’s line of haulers, and somewhere not far down the line, the GMC Sierra. The big Japanese players fall in place a bit further below — not that thereÂ’s anything wrong with a hundred thousand Toyota Tundra sales — and one-size-smaller trucks like the Toyota Tacoma, Ford Ranger and Chevy Colorado have proven awfully popular, too. Along with their sales numbers, the average cost of new trucks has similarly been on the rise. Now, I donÂ’t pretend to have the right to tell people what they should or shouldnÂ’t buy with their own money. But I just canÂ’t wrap my head around why a growing number of Americans are choosing to spend huge sums of money on super luxurious pickup trucks. Let me first say I do understand the appeal. People like nice things, after all. I know I do. I myself am willing to spend way more than the average American on all sorts of discretionary things, from wine and liquor to cameras and lenses. IÂ’ve even spent my own money on vehicles that I donÂ’t need but want anyway. A certain vintage VW camper van certainly qualifies. I also currently own a big, inefficient SUV with a 454-cubic-inch big block V8. So if your answer to the question IÂ’m posing here is that youÂ’re willing to pay the better part of a hundred grand on a chromed-out and leather-lined pickup simply because you want to, then by all means — not that you need my permission — go buy one. The part I donÂ’t understand is this: Why wouldn't you, as a rational person, rather split your garage in half? On one side would sit a nice car that is quiet, rides and handles equally well and gets above average fuel mileage. Maybe it has a few hundred gasoline-fueled horsepower, or heck, maybe itÂ’s electric. On the other side (or even outside) is parked a decent pickup truck. One that can tow 10,000 pounds, haul something near a ton in the bed, and has all the goodies most Americans want in their cars, like cruise control, power windows and locks, keyless entry, and a decent infotainment screen.