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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).

Chevrolet Malibu gets aggressive redesign for 2016

Cars like the Ford Fusion, Kia Optima and Chrysler 200 have recently raised the styling bar in the midsize sedan game is. In that regard, the rather anonymous Chevrolet Malibu has suffered in recent years. That no longer appears to be an issue with the 2016 Malibu, which is simply caked with interesting elements. The wide, aggressive grille, expressive headlights and angled LED running lamps make the Malibu look like the Impala's much angrier little brother. In back, the Impala inspiration is there, but like the fascia, it's noticeably more aggressive, with a sharper cant to the taillights and a pair of large, integrated dual exhausts (at least on the 2.0-liter, turbocharged model being featured by Chevy). Designers also worked to give the 'Bu a bit more character in the profile, adding a pair of character lines to cut back on the last-gen car's slab-sided looks. While the exterior could almost be described as sporting, the brown-and-beige color scheme in the cabin is noticeably more relaxed. A large, central MyLink system sits atop the dash, while drivers will also have access to a dedicated display in the instrument cluster. A thick-rimmed, three-spoke steering wheel is a bit on the large side, but still looks like a nice piece to work. You can read a lot more about the new 2016 Malibu in our original post from early this morning. But before you do that, have a look at our full gallery of live images from the floor of the Javits Center. All-New Malibu is Larger, More Technological and Efficient New hybrid sedan projected to offer combined rating north of 45 MPG DETROIT – Chevrolet today introduced the all-new 2016 Malibu – a completely restyled midsize sedan engineered to offer more efficiency, connectivity and advanced safety features than ever. An all-new hybrid powertrain, which leverages technology from the Chevrolet Volt, will help offer a GM-estimated combined rating north of 45 mpg. The Malibu's standard 1.5L turbo powertrain is projected to offer 37 mpg highway. The 2016 Malibu is also longer and lighter, with more interior space and improved fuel efficiency. Its wheelbase has been stretched close to four inches (101 mm), and it is nearly 300 pounds (136 kg) lighter than the current model. "Midsize customers tell us they want great fuel economy, connected technologies, wrapped in a gorgeous exterior. This is exactly what the 2016 Malibu was engineered to do," said Jesse Ortega, Malibu chief engineer.

Chevy rolls out Silverado HD High Country

It's been a good week for heavy-duty truck buyers. First, Ram revealed the Black Package for its HD trucks, then it rolled out its new Power Wagon, and now Chevy's getting in on the action with its Silverado High Country HD. Okay, so it may not pack quite the attitude of Ram's latest 2500-series offerings, but the High Country HD will come as a welcome addition to the Chevy Trucks range to those looking to pull their horse, boat or other trailer without skimping on creature comforts.
Rolled out a little under a year ago, the High Country trim is Chevy's answer to the likes of the GMC Denali, Ford King Ranch and Ram Longhorn. It has until now only been offered on the light duty, 1500-series Silverado, but now extends to the 2500 and 3500-series HD models, as well.
So what sets a High Country pickup apart from lesser Chevy trucks? You'll be able to pick it out based on its chrome horizontal grille, body-color bumpers, 6-inch tubular side steps, 20-inch chrome wheels (18-inch on the 3500 and 17-inch on the dualie) and, of course, plenty of special badging. But it's inside where the High Country makes its mark, with a cabin decked out in saddle brown perforated leather, seats that are both heated and cooled, eight-inch touchscreen with full MyLink suite, Bose audio and park assist functions front and rear to keep those color-keyed bumpers looking fresh. (Though Chevy hasn't yet showed us the interior of the HD model, it'll presumably look mostly the same as the cab in the 1500 High Country in the gallery below.)