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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 posts $4 billion third-quarter profit thanks to trucks and SUVs

DETROIT — General Motors is posting huge third quarter numbers, pulling in $4 billion in profit over three months after losing money due to the virus outbreak. GM's adjusted earnings were $2.83 per share, easily outpacing Wall Street's per-share projections of $1.43, according to a survey by FactSet. Revenue of $35.5 billion also edged out most expectations. Shares jumped almost 6% before the opening bell Thursday. The company swung back from a $806 million loss in the second quarter, when it was restarting factories shuttered for safety during the early stages of the pandemic. The Detroit automaker joined most global automakers in reporting better-than-expected earnings from July through September as sales across the globe started to rebound from coronavirus lockdowns, especially in China. GM sales in China jumped 12% in the third quarter, with sales of its Buick and Cadillac brands both rising more than 25%. In the U.S., GMÂ’s most profitable market, sales fell 9.9% in the third quarter compared with a year ago, but were a dramatic improvement over the 34% drop in the second quarter. Sales improved sequentially each month, the automaker said, an encouraging trend. GMÂ’s profit was boosted by higher-priced pickup trucks and large SUVs, which have seen strong sales in the U.S. through the pandemic. It was the best quarter on record for GM's Chevrolet Blazer. Sales of the Cadillac XT6 spiked 45% in the U.S. over last year. Large pickups also sold well. GM also said it was pumping $2 billion into its Spring Hill, Tennessee manufacturing plant to push its transition to produce electric vehicles. Last week, crosstown rivals Fiat Chrysler and Ford reported strong third-quarter net income. FCA said it made $1.4 billion for the period, while Ford earned $2.39 billion. Related Video: Earnings/Financials Buick Cadillac Chevrolet GM GMC

North American Car, Truck and SUV of the Year finalists revealed

The finalists for the 2023 North American Car, Truck and Utility Vehicle of the Year Awards were announced Thursday at the L.A. Auto Show. — The Acura Integra, Genesis Electrified G80 and Nissan Z made the cut in the car category. — The Ford F-150 Lightning, Chevy Silverado ZR2 and Lordstown Endurance advanced in trucks. — And the Cadillac Lyriq, Genesis GV60 and Kia EV6 advanced among utilities.  The winners will be announced Jan. 11 in Detroit.  The finalists underscored the industryÂ’s shift to electric vehicles, as all three utilities and two of the three trucks are EVs. The finalists were culled from a list of 26 semifinalists made up of three trucks, 10 cars and 16 utility vehicles that are new this year.  Notables that missed the cut include the Mercedes EQE, Subaru WRX and Toyota GR Corolla in cars; while the Honda CR-V, Kia Sportage and Rivian R1S were among the utes that did not advance. The three trucks are the only ones eligible this year and have advanced through the voting.  50 jurors who work for media outlets across North America vote three times over the course of the year to whittle down the field, which was originally 47 vehicles. Jurors also test the semifinalists at an October group event in Ann Arbor, Mich. The Honda Civic (car), Ford Maverick (truck) and Ford Bronco (utility vehicle) were the 2022 winners. Autoblog Editor-in-Chief Greg Migliore is a NACTOY juror.   Featured Gallery Ford F-150 Lightning View 48 Photos Green LA Auto Show Acura Cadillac Chevrolet Ford Genesis Kia Nissan Truck SUV NACTOY Lordstown Endurance