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2019 GMC Sierra AT4 gives Raptor and Ram a new off-road rival

The 2019 GMC Sierra AT4 blends off-road hardware into a modern, thoroughly updated pickup truck that doesn't skimp on power, luxury, or safety equipment. From its higher suspension setup to its available carbon-fiber cargo bed and the new MultiPro tailgate, the 2019 Sierra AT4 is a direct shot across the bow — or cargo beds, if you prefer — of staunch rivals like the Ford F-150, Dodge Ram and Toyota Tundra. Revealed tonight in New York City, ahead of this week's New York International Auto Show, the truck may seem to be in a strange setting. Then again, with the amount of tire-swallowing potholes currently scattered around the Big Apple, a rugged truck like the Sierra AT4 could be the perfect vehicle for either off-road excursions or an especially bumpy commute. Riding two inches higher than the standard 2019 Sierra, the AT4 comes with standard features like all-wheel-drive with a two-speed transfer case, locking rear differential, Rancho monotube shock absorbers designed specifically for off-roading, along with skid plates and 18- or 20-inch alloy wheels fitted with all-terrain tires or optional, mud-loving Goodyear Wrangler Duratecs. Hill descent control and GMC's Traction Select system are also standard. The latter of these two lets the driver choose between preset drive modes, suitable for various types of terrain and weather conditions. The system then adjusts throttle response, shift points, and the electronic stability control according to each mode. Related: 2018 GMC Sierra 1500 buying guide "The 2019 Sierra AT4 is designed for the customer who wants an elevated presence on the road and the capability to venture off life's beaten path," said Duncan Aldred, vice president of Global GMC. "It's also the beginning for the AT4 brand, which will be seen on every vehicle in our lineup in the next two years." Based on the new 2019 Chevrolet Silverado, the GMC Sierra (including the AT4 model) looks to stand out from its corporate cousin in terms luxury touches, along with some subtle exterior details. For the AT4, these visible differences include a body color grill surround and bumpers. Meanwhile, the inner grille, front fog-lights and faux fender vents feature a black-chrome finish. It's not flashy, which is probably exactly what GMC wanted for its upscale truck. The standard engine is a 5.3-liter V8, though buyers can choose an optional 3.0-liter turbo-diesel inline-six or 6.2-liter V8.

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.

5 reasons why GM is cutting jobs, closing plants in a healthy economy

DETROIT — Even though unemployment is low, the economy is growing and U.S. auto sales are near historic highs, General Motors is cutting thousands of jobs in a major restructuring aimed at generating cash to spend on innovation. It's the new reality for automakers that are faced with the present cost of designing gas-powered cars and trucks that appeal to buyers now while at the same time preparing for a future world of electric and autonomous vehicles. GM announced Monday that it will cut as many as 14,000 workers in North America and put five plants up for possible closure as it abandons many of its car models and restructures to focus more on autonomous and electric vehicles. The reductions could amount to as much as 8 percent of GM's global workforce of 180,000 employees. The cuts mark GM's first major downsizing since shedding thousands of jobs in the Great Recession. The company also said it will stop operating two additional factories outside North America by the end of next year. The move to make GM get leaner before the next downturn likely will be followed by Ford Motor Co., which also has struggled to keep one foot in the present and another in an ambiguous future of new mobility. Ford has been slower to react, but says it will lay off an unspecified number of white-collar workers as it exits much of the car market in favor of trucks and SUVs, some of them powered by batteries. Here's a rundown of the reasons behind the cuts: Coding, not combustion CEO Mary Barra said as cars and trucks become more complex, GM will need more computer coders but fewer engineers who work on internal combustion engines. "The vehicle has become much more software-oriented" with millions of lines of code, she said. "We still need many technical resources in the company." Shedding sedans The restructuring also reflects changing North American auto markets as manufacturers continue to shift away from cars toward SUVs and trucks. In October, almost 65 percent of new vehicles sold in the U.S. were trucks or SUVs. That figure was about 50 percent cars just five years ago. GM is shedding cars largely because it doesn't make money on them, Citi analyst Itay Michaeli wrote in a note to investors. "We estimate sedans operate at a significant loss, hence the need for classic restructuring," he wrote. The reduction includes about 8,000 white-collar employees, or 15 percent of GM's North American white-collar workforce. Some will take buyouts while others will be laid off.