2008 Sle 1500 Used 5.3l V8 16v 4wd Suv Onstar 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.

Pony cars, trucks and Italian SUVs | Autoblog Podcast #552

On this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor Alex Kierstein and Associate Editor Reese Counts. We discuss the updated 2019 Chevy Camaro Turbo 1LE variant, the new 2019 GMC Sierra Denali, and the Ferrari-powered Maserati Levante GTS. We also debate whether Volkswagen should build the Atlas-based Tanoak pickup truck and what a delay means for the next-gen Ford Mustang. Finally, we answer a reader question about the state of Lexus.Autoblog Podcast #552 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown 2019 Chevy Camaro Turbo 1LE 2019 GMC Sierra 2019 Maserati Levante GTS Should Volkswagen build the Tanoak? Next-gen Ford Mustang delayed The past, present and future of Lexus Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: Podcasts Chevrolet Ford GM GMC Lexus Maserati RAM Truck Coupe SUV Luxury Performance

2017 GMC Sierra 2500HD All Terrain X eyes Ram Power Wagon

If where you're going, you don't need roads, you're spoiled for choice by American automakers. Ford has the F-150 Raptor, Jeep the iconic Wrangler, and Ram offers Power Wagon. And that's just the tip of the factory off-road iceberg. General Motors is getting in on the off-roading action with the Canyon and Sierra 1500 All Terrain X. Now, the automaker is adding another notch on its belt with the Sierra 2500HD All Terrain X. On the outside, GMC continues to the all-black trend as the rest of its off-roading-oriented lineup, which includes 18-inch aluminum wheels finished in black, a bespoke grille surround, black sport bar that's mounted in the truck's bed, and four-inch side steps in black. The All Terrain X will only be offered in two colors – Black Onyx and Summer White. Those looking for more off-roading capabilities and tack the Z71 off-road suspension package as an option on the All Terrain X, adding performance Rancho shocks, Hill Descent Control, and a shield for the underbody transfer case. Two engine choices lie under this crew cab pickup's massive hood - the 6.0-liter gas V8 or the all-new Duramax 6.6-liter turbo-diesel V8. The gasoline-powered V8 continues to make 360 horsepower and 380 pound-feet of torque, while the new Duramax turbo-diesel generates 445 horsepower and 910 pound-feet of torque. While the All Terrain X may not have the same murderous look as the Ram Power Wagon, it makes off-roading a luxurious affair. And it's blacked out. The 2500HD power wagon will be on sale early next year, with a pricing announcement coming sometime in the next few months. Related Video: Featured Gallery 2017 GMC Sierra 2500HD All Terrain X: LA 2016 View 12 Photos Related Gallery 2017 Sierra HD All Terrain X News Source: GMCImage Credit: Live photos copyright 2016 Drew Phillips / Autoblog LA Auto Show GM GMC Truck Off-Road Vehicles Performance 2016 LA Auto Show gmc sierra hd