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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.

2023 GMC Sierra HD MSRP up at least $1,000

Once Chevrolet bumped up the 2023 Silverado and Silverado HD MSRPs by $1,000, there was no reason to think luxury cousin GMC wouldn't do the same. The proof is here, pricing for the 2023 GMC Sierra HD up on its configurator with premiums of at least $1,000 over 2022 models. As we mentioned of the Silverado, the Sierras have also tracked with the price increases we mentioned in reference to the Chevrolets; the 2022 Sierra 1500 has run up $4,700 over its cost last October, the 2022 Sierra HD is $4,100 more than it was when it hit lots last summer. That puts a 2023 Sierra HD 2500 Regular Cab long bed with two-wheel drive and the 6.6-liter V8 gas engine at a starting price of $42,995 after the $1,795 destination charge, $1,000 beyond the 2022 pickup. At the top, a Crew Cab long bed Denali with four-wheel drive and the 6.6-liter Duramax V8 starts at $83,845, which is $1,250 more than the same rig from the 2022 model year. Moving up a weight class to the Sierra 3500, the price of entry starts $1,000 more than before at $44,195. The big bad boy 3500 Denali 4WD dually starts $1,200 more than before, at $86,245. The situation's a bit cloudier when we step down two classes to the 1500. GM Authority got the price sheet for the 2023 Sierra 1500 and reports that prices are up $1,000 on most trims, but $900 up on the Denali Ultimate and $1,900 up on the AT4. GMC hasn't uploaded the configurator for the 2023 trucks yet, and GMA's price sheet is hard to parse against prices on the 2022 configurator because the end of the model year and supply chain issues have translated into mandatory discounts that can't be accounted for. For instance, the 2022 Sierra 1500 Regular Cab standard box in entry-level Pro trim has an MSRP of $40,000, yet the configurator shows the total vehicle and options price as $39,950. After the $1,795 destination charge, that comes to $41,745. Then there's a mandatory package discount of $1,500, taking the final price before any other fees to $40,245. Meanwhile, GMA's paperwork shows the 2023 price starting at $40,020 after destination, which isn't $1,000 more than any figure on the configurator. At the top end, the 2022 Denali with the Crew Cab, standard box, 4WD, and 6.2-liter V8 comes out to $71,695, only because the front and rear park assist and steering column lock aren't fitted, resulting in a $100 discount.

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.