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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).

2017 GMC Canyon steals Cadillac's V6 for a little more power

GMC is fortifying the Canyon with a new powertrain and two new trim levels for 2017. GMC will give the Canyon the 3.6-liter V6 found in the Cadillac ATS, CTS, CT6, and XT5 crossover. The engine will be matched to an eight-speed automatic transmission, which also can be found on Cadillacs, the new 2017 Colorado, and other General Motors vehicles. The new engine comes with variable valve timing, improved direct injection, and Active Fuel Management, which is a form of cylinder deactivation that shuts off two cylinders to increase fuel efficiency and performance. Power is up from 305 to 308 horsepower, while torque increases from 269 to 275 pound-feet of torque compared to the old 3.6-liter V6. With the new transmission, the Canyon benefits from a higher first gear ratio, which should help drivers get off the line more easily when towing large cargo, and lower overdrive ratios for improved fuel efficiency. The 2016 model had a six-speed automatic. The Colorado also gets the eight-speed transmission for '17. GMC previously announced the All Terrain X and Denali models. The All Terrain X trim is offered on the SLE model and comes with the new 3.6-liter V6 engine or the 2.8-liter Duramax turbo-diesel. The All Terrain X gets Goodyear Wrangler DuraTrac P225/65R17 all-terrain tires, a body-color grille surround and matching rear step bumper, bespoke 17-inch aluminum wheels, and a spray-on bedliner. The truck also is fortified with Hill Descent Control and an off-road suspension. The Denali carries the flag as the most luxurious Canyon model and gets a Bose seven-speaker audio system, more chrome, and interior upgrades. In addition to the new models and the powertrain, the 2017 Canyon will be offered with new colors – Dark Slate Metallic, Mineral Metallic, and Red Quartz Metallic – a new IntelliLink radio with a seven-inch touchscreen, a heated steering wheel as an optional extra, and Standard Teen Driver Mode. The 2017 Canyon, with all of its changes, will be available in the fourth quarter of the year. Related Video: Featured Gallery 2017 GMC Canyon Denali: LA 2015 View 14 Photos News Source: GMC Cadillac GMC Truck Luxury Off-Road Vehicles engine gmc canyon chevrolet colorado

2018 GMC Canyon Denali isn't worth the money

In the GMC lineup, Denali is the top dog. It's the trim with all the bells and whistles, and often provides an experience comparable to Cadillac. Unfortunately that's not the case in the GMC Canyon Denali we drove recently. In the Canyon's case, the Denali trim isn't worth the price premium because it isn't luxurious enough and doesn't distinguish itself from the midlevel SLT trim. While the outside maintains the Denali look with a unique chrome grille, chrome door handles, 20-inch wheels, and big Denali badges (which a guy at a car wash immediately noticed when this editor drove past), the interior and feature set don't rise to meet the borderline Cadillac image of Denali. All GMC did to spruce up the already drab, gray, plasticky interior of the Canyon was give it black leather, some real aluminum trim, some fake wood trim, and stitched soft-touch surfaces. The aluminum and leather are nice touches, but they don't look much different from the black and aluminum-look plastic in lower trim models. The fake wood also looks really fake. They're also exactly the same upgrades as what you'll find in an SLT. But the SLT offers a dark brown color scheme as an option, which would help alleviate the dinginess, and the SLT, equipped exactly like a base Denali, costs $2,690 less at $41,575. The same issue comes up with equipment. The Denali has heated seats and steering wheel, navigation, automatic climate and navigation, but so does the SLT. The big problem here is that Denali is supposed to indicate the best, most luxurious vehicle GMC has to offer, but there's not enough differentiation — or specialness, even — to separate it from a well-optioned SLT. GMC needs to give the Denali something more. It needs some real wood trim, or perhaps some interior schemes with contrasting materials you can't find in other Canyons. It should have some other special luxury features included that can't be added to lower trim GMCs such as a heads-up display, automatic windshield wipers, push-button keyless entry and starting, things like that. The real reason to buy the Canyon Denali is really to get the prestige that the Denali badge brings, rather than the specific equipment it has — the Denali name has some value, after all. But if you can look past the badge and focus on practicality, the SLT is the runaway winner, offering the exact same experience for a notably lower price.