1984 Gmc Sierra 1500 Classic, Gold, Automatic. 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.

2020 GMC Acadia AT4 priced just a little more than the SLT trim

Cars Direct has seen the order guide pricing the 2020 Acadia AT4 at $42,495 after destination; that means a $41,300 MSRP plus $1,195 for shipping and handling. GMC has left a lot of pricing room between the rugged, all-wheel drive AT4 and the dressed-up, top-shelf Acadia Denali with AWD, the latter costing $49,495, a $7,000 difference. The spread's blown out some by what appears to be an $800 increase for the 2020 Acadia Denali with all-wheel drive. The 2019 model costs $48,695. On the other hand, it looks like the 200 Acadia SLT trim has gone down in price. Cars Direct says that model will run $41,995, which is $300 less than the 2019 version that goes for $42,295 after destination. The new price leaves a $500 gap between the SLT-1 model with all-wheel drive and the AT4 trim, a figure that's a no-brainer to justify for any buyers trying to get a more butch curb appeal.     The Acadia AT4 package comes standard with all-wheel drive and the 3.6-liter V6 with 310 horsepower and 271 pound-feet of torque, puts black chrome on the grille, and nabs a set of exclusive 17-inch wheels on all-terrain tires. The other two engines in the lineup are a new turbocharged 2.0-liter four-cylinder with 230 horsepower and 258 pound-feet of torque, and cylinder deactivation. That motor will be the standard kit on the SLT and Denali trim levels, supplanting the 3.6-liter that's standard on the 2019 models. The entry-level engine carries over, a naturally aspirated 2.5-liter four-cylinder making 193 horsepower and 188 pound-feet of torque.

GM crab walked the Hummer EV truck up and down Woodward this weekend

Sometimes, manufacturers like to show off their fancy new wares at the Woodward Dream Cruise. It’s largely done through static showcases with big displays for the public to gawk at. However, GM did something a little different with its GMC Hummer EV truck this year. Instead of parking it at the Chevy and GM display area, it took to Woodward Avenue itself to show off the Hummer in pre-production form. Not only did GM drive the electric truck on the road in front of thousands, but it crab walked the whole way. This was our first time, and probably most of the publicÂ’s first time seeing the Hummer EV crab mode in person. Judging from the crowdÂ’s reaction (GM got its wish of everybody paying attention), folks are impressed, and maybe a bit confused at the HummerÂ’s sideways movements.  ItÂ’s a strange spectacle to see in person. At first, the truck appears as though itÂ’s sliding sideways on ice in a smooth, graceful slide. ThatÂ’s because even though the wheels are turned, the front of the truck is still pointing dead straight ahead. The GM employee behind the wheel of the prototype appeared to be moving forward at about 5-10 mph — it appears shockingly quick in person for the way this behemoth of a truck presents itself. The tech making it work is rather simple in concept. GM simply took existing rear-wheel steering technology, then amplified and modified it for this type of movement. Whereas most cars with rear-wheel steering max out at around 5 degrees of lock with the rear wheels, this Hummer can turn the wheels up to 10 degrees. Turn the wheel left or right in crab mode, and the Hummer moves diagonally down the street. If you use it for its intended purpose, crab mode is meant to help you navigate the Hummer through trails it might otherwise be too big to fit through using regular steering. In reality, we suspect most folks might use crab mode in the exact same fashion as GM did this past weekend: to impress people. And honestly, we canÂ’t blame them. It was a seriously cool sight to see. Crab mode in action: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.