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GMC Sierra Denali CarbonPro bed is finally, almost here

GMC revealed the Sierra 1500 with the optional CarbonPro bed on March 1, 2018. The bed wasn't available at launch, though. You can't buy it now, either, but it will hit dealerships with limited availability after production starts in early June, exclusively for the Denali 1500 and AT4 1500 trims. The carbon floor and sides replace the steel panels in a normal bed, providing "strength, durability, and scratch resistance" and a potential 59-pound weight saving, depending on the truck's configuration. To make sure the bed had a chance, development engineers replicated "extreme use scenarios" like dropping 1,800-pound gravel loads, 450-pound steel drums, and cinder blocks from various heights. They put a 250-pound man on a snowmobile with studded tracks, had him drive into the bed and then go wide-open throttle. We're told the result was "minimal scratching." On top of the extreme weather testing any vehicle goes through, the team also put a generator in the bed and aim the exhaust into a corner to ensure vibration and direct heat wouldn't deform the carbon fiber. Because of the finer shaping area-specific strength possible with carbon fiber, the bed provides one cubic foot of additional payload space by having its sidewalls pushed further out. The CarbonPro bed doesn't need a bedliner, and is grained at the top for better traction but smooth on the bottom for easier hosing down and dirt removal. Tie-downs at the front of the bed work with molded indentations to hold motorcycle tires, and slots in the sidewalls hold two-by-sixes. The truck maker says the carbon-lined payload area confers "best-in-class dent, scratch and corrosion resistance," but we suppose the nation's pickup truck army will prove that or not. The trucks likely won't have the hardest life at the start, since the Sierra Denali costs $56,790 before even a basic option like four-wheel drive. The real test probably won't come until around 2029, when third owners begin treating their aerospace-inspired thoroughbreds like dray horses.

GMC Sierra Elevation Edition is a dark take on a tough truck

GMC proved that it knew how to make a mean-looking pickup with the 2015 Sierra Elevation Edition. For the 2016 model year, the company is applying that aggressiveness to the refreshed Sierra that already looks tougher than the predecessor. The result is a seriously brawny truck that hits the market in the first quarter of 2016. Still based on the Sierra Double Cab, this latest take on the Elevation Edition starts with all of the styling tweaks for the standard 2016 truck, including a reshaped grille and headlights. From there, the pickup gets monochromatic with body-color parts for the door handles, mirror caps, grille surround, and bumpers. Black, 20-inch wheels finish the aggressive aesthetic. Drivers get an interior packed with tech, complete with a six-speaker stereo and seven-inch infotainment system that supports Apple CarPlay and Android Auto. All the occupants can also stay connected anywhere with OnStar 4G LTE and a WiFi hotspot. Under the hood, the Elevation Edition comes standard with a 4.3-liter V6 making 285 horsepower and 305 pound-feet of torque. A 5.3-liter V8 with 355 horsepower is also optional. Regardless of the powerplant, both come with a locking rear differential and the choice of two- or four-wheel drive. Check out the video below for a closer look at last year's truck, then scroll just a little bit further for the complete press release from GMC. Related Video: GMC Updates Sierra Elevation Edition for 2016 Sport appearance wears new front-end design, latest connectivity technologies DETROIT – The popular GMC Sierra Elevation Edition returns for 2016 with the styling enhancements and other features new to the entire Sierra 1500 lineup – including revised front-end styling with new, high-intensity discharge projector-beam headlamps and GMC Signature LED lighting. The Elevation Edition – available on Sierra double cab – has a street-smart stance, thanks to body-color moldings, door handles, mirror caps and a body-color grille surround, as well as body-color bumpers. It also rolls on 20-inch black-painted aluminum wheels and is further enhanced with new Elevation Edition badging. "The Sierra Elevation Edition offers a boldly styled pickup for customers who want a truck that looks as good as it performs," said Duncan Aldred, U.S. vice president, Buick and GMC.

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.