2008 Gmc Yukon Xl Denali Dvd Navigation-no Reserve 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.

2022 GMC Sierra 1500 AT4 Driveway Test | How to use the GMC MultiPro Tailgate

The GMC MultiPro Tailgate is a six-way tailgate that was introduced on the current-generation GMC Sierra 1500 back in 2018. Three years later, not a whole lot has changed, and while the tailgate offers quite a bit more utility than a normal tailgate, the frustrations we had when first testing it are still there. There’s a specific order the tailgate has to be opened for certain uses to work, and it can be a bit awkward to use at times when trying to close multiple steps and tailgates on a variety of different hinges. Is it useful utility, a marketing gimmick to sell more trucks or a mixture of both? Take a look at the video above and let us know what you think in the comments below. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Ward's releases 10 Best Interiors list for 2014

While we're still a ways off from the automotive awards season proper, where things like North American Car and Truck of the Year, Motor Trend's Car of the Year and Car and Driver's Ten Best are named, that doesn't mean there aren't trophies being handed out to deserving automakers. Ward's 10 Best Interiors being one of them.
As the name might imply, the magazine focuses on the very best interior treatments in the US market. Whereas some awards purposely exclude extreme, high-dollar offerings, Ward's considers them - the only requirement is that a vehicle has a "new or significantly redesigned interior."
Ward's offered up the list of winners in simple, alphabetical order, and it only seems fair to do the same: