2008 Gmc Yukon Denali 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.

Sunday Drive: An automotive flavor for every taste

Last week was flush with interesting new vehicle debuts, led by the new 2019 Hyundai Santa Fe. This crossover is entering straight into the heart of one of the world's most competitive automotive segments, and it's doing so with a fresh sense of style and a brace of new technologies. Our readers are clearly intrigued – the Santa Fe was the biggest news story of the last week on these online pages. It's fitting that a crossover generated a lot more interest than a traditional wagon, though we don't really have to be happy about it. Still, the completely new, fully redesigned Volvo V60 is worth taking another look at. First of all, it's pretty, in a traditionally Scandinavian way. Second, it's quick, with a 0-60 time of as little as 4.8 seconds. And finally, it's practical, with all kinds of room for cargo without the dynamic penalties of an unnecessary lift kit. Moving on from new vehicle debuts, we took another long look at the Honda Ridgeline. It's definitely a non-conformist pickup truck, based not on a body-on-frame platform but on a more carlike unibody design. That means it can't tow as much as some other trucks, but it also means the Ridgeline drives better than any of its more truckish competitors. It's the Swiss army knife of pickup trucks. Rounding out our coverage from last week are three sets of spy photos, each showing the interior of a hotly anticipated new model. One is a truck, one is a crossover, and the last is a sportscar. All of them are worth another look. As always, stay tuned to Autoblog this week for all the most important news in the automotive world. 2019 Hyundai Santa Fe unveiled 2019 Volvo V60 | Sleek, swift new twist on the Swedish wagon 2018 Honda Ridgeline | Pocketknife pickup is up for anything 2019 GMC Sierra interior looks just like the Silverado's 2019 Cadillac XT4 interior has actual buttons, no more touch-sensitive panel 2020 Porsche 911 992 spy shots show interior and manual transmission Cadillac GMC Honda Hyundai Porsche Volvo Truck Crossover Wagon Luxury Performance Sedan hyundai santa fe

GM SUV window switch recall urges owners to park vehicles outside

It's not unusual for there to be a lag between an automaker announcing a recall and the official documentation showing up on the National Highway Traffic Safety Administration website. So it's no surprise that a recent GM campaign took about a month to appear in its official capacity. However, there appears to be some big differences between the two reports with potential safety implications.
In late June, GM announced that it needed to recall 181,984 examples of the Chevrolet Trailblazer, Buick Rainier, GMC Envoy, Isuzu Ascender and Saab 9-7x from the 2005-2007 model years, plus the 2006 Chevy Trailblazer EXT and 2006 GMC Envoy XL. The new documents paint a slightly different picture with 184,611 needing repaired and different model years listed.
The reason for the fix is still the same, though. It's possible for fluid to contact the master power window switch module in the driver's door, which can corrode the part. Eventually this could cause a short circuit, leaving the buttons inoperable and potentially leading to a fire. But the new NHTSA documents add an important note: "A fire could occur even while the vehicle is not in use. As a precaution, owners are advised to park outside until the remedy has been made."