2003 Gmc Sierra 2500hd / No Reserve / 4x4 /duramax Turbo Diesel 6.6l Engine / on 2040-cars

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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.

NHTSA, IIHS, and 20 automakers to make auto braking standard by 2022

The National Highway Traffic Safety Administration, the Insurance Institute for Highway Safety and virtually every automaker in the US domestic market have announced a pact to make automatic emergency braking standard by 2022. Here's the full rundown of companies involved: BMW, Fiat Chrysler Automobiles, Ford, General Motors, Honda, Hyundai, Jaguar Land Rover, Kia, Mazda, Mercedes-Benz, Mitsubishi, Nissan, Subaru, Tesla, Toyota, Volkswagen, and Volvo (not to mention the brands that fall under each automaker's respective umbrella). Like we reported yesterday, AEB will be as ubiquitous in the future as traction and stability control are today. But the thing to note here is that this is not a governmental mandate. It's truly an agreement between automakers and the government, a fact that NHTSA claims will lead to widespread adoption three years sooner than a formal rule. That fact in itself should prevent up to 28,000 crashes and 12,000 injuries. The agreement will come into effect in two waves. For the majority of vehicles on the road – those with gross vehicle weights below 8,500 pounds – AEB will need to be standard equipment by September 1, 2022. Vehicles between 8,501 and 10,000 pounds will have an extra three years to offer AEB. "It's an exciting time for vehicle safety. By proactively making emergency braking systems standard equipment on their vehicles, these 20 automakers will help prevent thousands of crashes and save lives," said Secretary of Transportation Anthony Foxx said in an official statement. "It's a win for safety and a win for consumers." Read on for the official press release from NHTSA. Related Video: U.S. DOT and IIHS announce historic commitment of 20 automakers to make automatic emergency braking standard on new vehicles McLEAN, Va. – The U.S. Department of Transportation's National Highway Traffic Safety Administration and the Insurance Institute for Highway Safety announced today a historic commitment by 20 automakers representing more than 99 percent of the U.S. auto market to make automatic emergency braking a standard feature on virtually all new cars no later than NHTSA's 2022 reporting year, which begins Sept 1, 2022. Automakers making the commitment are Audi, BMW, FCA US LLC, Ford, General Motors, Honda, Hyundai, Jaguar Land Rover, Kia, Maserati, Mazda, Mercedes-Benz, Mitsubishi Motors, Nissan, Porsche, Subaru, Tesla Motors Inc., Toyota, Volkswagen and Volvo Car USA.

GMC talking to dealers about possible Jeep Wrangler competitors

With respect to the team at GMC, it's pretty much fair to say the manufacturer prospers on a lineup of nothing more than gussied up Chevrolets. The brand's successes aside, GMC can be boiled down thusly – the Sierra is a Silverado, the Terrain an Equinox, the Canyon a Colorado and the Acadia is a Traverse, albeit with sometimes dressier duds. Strictly speaking, it's not that simple – Acadia and Terrain have siblings beyond the Bowtie – but the brand is remarkable for its lack of distinctive models. That could change, though, as The Wall Street Journal is claiming General Motors has broached the idea of a building a GMC-badged competitor to the Jeep Wrangler during a meeting with dealers. WSJ claims the new off-roader would "borrow cues and capability" from the defunct Hummer brand. That, of course, could mean many, many different things. While the original Hummer, the H1, was an exceptionally capable vehicle off-road, the H2 and H3 weren't nearly as single minded. It's unclear if a Hummer-inspired, off-road-ready GMC would lean more towards the former than the latter. According to WSJ's report, the GMC Jeep appears to be in the very, very early planning stages, with one unnamed source saying the idea was "being kicked around real hard." GM is still courting dealers for feedback, while it refused the Journal's request for comment. What are your thoughts? Is a Wrangler competitor long overdue for GM? Do you think GMC is the best brand to introduce such a model? Have your say in Comments. Related Video: Featured Gallery 2013 Jeep Wrangler Unlimited Rubicon 4X4 View 12 Photos News Source: The Wall Street JournalImage Credit: Copyright 2015 AOL GM GMC SUV Off-Road Vehicles