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Chevy's 6.6-liter Duramax is pretty much all new

To say there's a heated battle in heavy-duty pickups is an understatement, with Chevrolet, Ford, and Ram constantly trading blows of increased torque, horsepower, and towing capacity. The latest salvo is the revised, more powerful turbo diesel 6.6-liter Duramax V8 in the 2017 Chevy Silverado. It has 910 pound-feet of torque, an increase of 145, putting it nearly level with the Ford Super Duty. Here's a closer look at where those gains come from. How exactly did Chevrolet add all that torque plus 48 horsepower? The automaker essentially took a fine-tooth comb to the entire engine. Chevy says it changed 90 percent of the V8, and the cumulative effect of those small changes adds up to big increases. As you might guess, the turbocharger is updated. The larger unit features electric actuation of the variable nozzle turbine (VNT), and what Chevy calls a double axle cartridge mechanism that separates the VNT moving parts from the housing. That helps with heat performance as well, with a claim that the exhaust side of the turbo can run continuously up to 1,436 degrees Fahrenheit. Helping that cause are six exhaust gaskets made of Inconel - an nickel alloy that contains chromium and iron – and upgraded stainless steel for the exhaust manifold. Despite having the same cast iron cylinder block, albeit with some minor enhancements, the engine has new cylinder heads, pistons, piston pins, connecting rods, and crankshaft, which have all been upgraded to handle 20 percent higher cylinder pressures. Alongside the increase in pressure, Chevrolet also increased the cylinder head's structure with a honeycomb design. The pattern features high-strength aluminum with dual layer water jackets that not only improve strength, but also optimize water flow for better cooling. For 2017, the cylinder head also benefits from integrated plenum that aids the engine in getting more air under heavy loads. The cylinder head isn't the only component to get a minor update, as the pistons have a larger diameter pin for improved oil flow. The same detailed improvements has been bestowed to the humble connecting rods (second in our hearts only to the inanimate carbon rod). The new design has the bolts oriented roughly 45-degrees to the rod instead of parallel. The angle split design, as it's called allows for easier passage through the cylinder.

2022 GMC Hummer EV shows off accessories ahead of SEMA

As is the case with nearly every new off-roader on the market, the 2022 GMC Hummer EV will have a bunch of accessories available for personalizing the big electric pickup truck. In fact, GMC says that the total number of add-ons is close to 200. But for the SEMA show, it's sharing just a few of what it says are the more interesting accessories. Quite a few of these parts will take you a long way to turning the Hummer EV into an overlander. The most obvious is the roof-top tent that utilizes mounts on the roof and the bed. It looks quite large and roomy. Naturally, auxiliary lighting is available, too, including a 50-inch roof light bar and two smaller spot lights that mount ahead of the A pillars. For storage, there's a nifty swing-out toolbox, shown in the gallery as more of a tackle box, plus a battery-powered cooler and a bed-mount for a full-size spare tire. There's also a more traditional bed extender and simple bed rail-mounted rack. And just for fun, you can get a Kicker audio sound system built into the MultiPro tailgate to listen to your music. Not all the accessories are about utility, though. There are some visual enhancements such as the red decals shown in the gallery. They match other decals and badges available, and they're offered in bronze, too. There are some branded puddle lights on offer as well. These should be available around when the Hummer EV pickup goes on sale next year. Pricing for each part will surely vary, though exact numbers haven't been announced. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

2017 GMC Canyon Denali brings the bling

Denali is an incredibly important part of GMC's product strategy. It takes very little effort to create a Denali variant, and these models retail for big premiums over the models on which they're based. So if you're GMC, it makes sense that you'd want to create a Denali version of every product in your range. That in mind, enter the 2017 Canyon Denali. GMC's midsize pickup gets all of the usual Denali trimmings, including a new grille, chrome trim, 20-inch wheels, and the necessary badging. Inside, there's a unique instrument panel, Jet Black leather, heated and cooled seats, and again, Denali badges abound. GMC says the Canyon Denali will be offered exclusively in the crew cab body style, with either the 3.6-liter gasoline V6 or 2.8-liter diesel engine. Have a look at the fancy truck in our gallery above, and scroll down for GM's official press blast. GMC Introduces 2017 Canyon Denali Exclusive design cues, content elevate industry's first premium midsize truck DETROIT, Tuesday, Nov. 17, 2015 – Denali is the ultimate expression of GMC's professional grade style, luxury and capability – and it is coming to the Canyon midsize truck. The 2017 Canyon Denali is being introduced today, ahead of its public debut at the Los Angeles Auto Show. It goes on sale in late 2016. "Canyon is the segment's first and only premium midsize truck, offering unparalleled capability and efficiency matched with maneuverability and refinement," said Duncan Aldred, vice president of GMC Sales and Marketing. "The all-new Canyon Denali builds on that award-winning combination with the distinctive styling, luxurious interior and elevated content that has defined the Denali nameplate since its introduction nearly 17 years ago." Like all Denali models, the new Canyon Denali is distinguished with a unique chrome grille and unique wheels – 20-inch ultra-bright-machined aluminum wheels with painted accents. Exterior cues include chrome fog lamp bezels, five-inch-diameter rectangular chrome assist steps, a polished exhaust tip and a standard spray-in bed liner. The Canyon Denali will be offered in six exterior colors. Inside, a Jet Black interior features Mulan leather-appointed seats with perforated, heated-and-ventilated front seats – exclusive content in the Canyon lineup – along with unique instrument panel and console trim; and Denali-logo sill plates and floor mats. Standard technologies include Forward Collision Alert and Lane Departure Warning.