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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).

2018 GMC Terrain Drivers' Notes Review | Summon the Druids, it's a better Equinox

We've had plenty of time in the all-new Chevrolet Equinox, testing it with all three of its available turbocharged four-cylinders: the 1.5-liter, the 2.0-liter performance upgrade and the diesel fuel economy upgrade. Finally, however, we get a turn behind the wheel of its brother from a different corporate mother: the 2018 GMC Terrain. This duo is certainly one of the most disparate pairings in GM's long badge-engineering past, with virtually no visual similarities inside and out. They're even less similar than the last Equinox-Terrain, which themselves were a far-cry from the Blazer-Jimmy days. They're largely the same under the skin, however, including their selection of engines. For the 2018 Terrain, we sampled the 1.6-liter four-cylinder turbodiesel good for 137 horsepower and 240 pound-feet of torque. It's an unusual powertrain to be sure, as no other compact crossover SUV in this country offers one (though Mazda has been threatening to do so for years now), but boasts an EPA-estimated fuel economy rating of 28 mpg city, 39 mpg highway and 32 mpg combined with front-wheel drive. It's basically the same with all-wheel drive. The as-tested price of the SLT Diesel was a rather hefty $39,605. It did, however, have most options, including the Infotainment Package II and Driver Alert Package II that together include all the extra entertainment and safety gadgets. Contributing Editor James Riswick: Let's be honest, the main difference between the 2018 GMC Terrain and its Equinox sibling is the way they look. As such, I can definitively say I prefer the Terrain. It's far more cohesive and better proportioned than the rather dumpy Equinox. It also avoids the garish over-adornment of the last Terrain even if the floating roofline D pillar has passed its expiry date. I think the interior looks better too. As for the way it drives, the 2018 Terrain demonstrates great improvements from one generation to the next. The steering in particular is greatly superior in its feel and feedback. Body motions are also kept nicely in check. Is it a Mazda CX-5 or Ford Escape beater? No, but it's far more confidence inspiring now. So that's the good. Now, the extremely bad. This diesel engine vibrates so much I can't imagine anyone taking one for a test drive and choosing it over the 1.5-liter gasoline turbo. You feel it through the wheel, the pedals and the seat of your pants constantly. It's particularly bad when stopped and even present when just cruising on the highway.

GMC introduces Canyon Nightfall Edition for the steathly and stylish

It may be just now arriving at dealers, but the 2015 GMC Canyon has just received its very first special edition trim, although the stealthy Nightfall Edition is, in the greater scheme of aesthetic upgrades, pretty basic. GMC has blacked out the truck's grille and side steps, added a spray-in bedliner as standard, fitted new 18-inch "Dark Argent" wheels with black inserts, a polished exhaust tip, remote start and automatic climate control. Naturally, the Nightfall Edition is only available with Onyx Black paint. Customers interested in the blacked-out pickup will need to choose between two-wheel drive and four-wheel drive, although they'll be freed the burden of picking a trim level or body style, as the Nightfall is limited to the mid-grade SLE with the four-door crew cab arrangement. "The new Canyon Nightfall Edition expands the Canyon lineup and gives style-conscious customers another choice," GMC's vice president of sales and marketing, Duncan Aldred, said in a statement. "Importantly, customers get the great looks of the Canyon Nightfall Edition and its unique content at a greater value than ordering the features separately." GMC has not released any information about the price of the Nightfall Edition, or when it will arrive in dealerships. Scroll down for the full press release announcing the newest member of the Canyon family. GMC Introduces 2015 Canyon Nightfall Edition Special edition model offers sleek, shadowy appearance 2015-01-08 DETROIT – GMC today introduced the 2015 Canyon Nightfall Edition – a stylized, blacked-out edition of the brand's all-new premium midsize truck that blends a dramatic appearance with popular features and accessories. The Canyon Nightfall Edition is offered on SLE crew cab models, either 2WD or 4WD, in Onyx Black and will be available in the first quarter of 2015. In addition to standard equipment on the SLE, the Canyon Nightfall Edition includes: Unique black grille Black assist steps Factory spray-in bedliner 18-inch multi-spoke aluminum wheels with Dark Argent painted inserts Polished exhaust tip Automatic climate control Remote start "The new Canyon Nightfall Edition expands the Canyon lineup and gives style-conscious customers another choice," said Duncan Aldred, vice president of GMC Sales and Marketing.