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MotorWeek's 80's GM muscle coupe roundup includes Regal GN and Monte Carlo SS

Even with just four brands in the family, General Motors still represents a performance powerhouse. Between the Chevrolet Corvette Z06, Camaro Z/28, Cadillac CTS-V and ATS-V, The General can still deliver plenty of thrills. The 1980s, though, saw the brand go even crazier with performance. While the Camaro and Corvette were still around back in the day, GM had a number of other interesting performance offerings. The Bowtie was complemented by the long-deceased Monte Carlo SS, while the now-defunct Pontiac and Oldsmobile offered the Grand Prix and thumping 442, respectively. And Buick, which isn't short on performance with its Regal GS and Verano Turbo, offered a much more serious vehicle, in the form of the Grand National (not to mention the Darth Vader-spec GNX). MotorWeek, in its hugely entertaining retro flashbacks, looks back on these three long-lost GM performance icons, and it's just as good as you might expect. News Source: MotorWeek via YouTube Buick Chevrolet GM Pontiac Coupe Performance Classics Videos buick grand national chevy monte carlo oldsmobile 442

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.

Here are all the cars GM is axing as part of its restructuring

GM plans to kill off a couple of great and a few meh cars as part of its restructuring. Here's a rundown of all the cars being phased out of production. None of the vehicles GM axed were SUVs or crossovers. Instead, it was an action reminiscent of what Ford recently decided to do by discontinuing U.S. sales every Blue Oval sedan. GM just didn't explicitly say, "We're killing our cars," like Ford did — probably a smart move by GM. Keep scrolling down to see the full list of deceased GM models. Chevrolet Volt This one was the most surprising of all the cars GM decided to can, primarily because cars with plugs are supposed to be our future. However, maybe consumer demand just isn't quite there yet for a plug-in like the Volt. We came up with all sorts of ideas for what was to blame for the untimely demise of the Volt, so go check that out for a full breakdown of the situation. Cadillac CT6 Here's another car we'll be sad to see go. Cadillac's flagship sedan was such a joy to drive, and it served as the conduit to deliver GM's semi-autonomous Super Cruise system, which still hasn't been surpassed by any other company's technology in our books, even Tesla's Autopilot. That being said, GM does plan to produce the CT6 until March, with the last cars coming off the line set to be twin-turbo V8 V-Series models. If it's going to go, this seems like a pretty great way to make an exit. We'll be patiently awaiting the next flagship Cadillac once this one finally fades away. Chevrolet Impala The Impala is actually a pretty good car. It doesn't sell terribly, and we think it's a completely satisfactory car to drive. However, people would rather have a Traverse or Equinox these days, making the Impala one of the vehicles to find itself on this list. Chevrolet is keeping its smaller brother, the Malibu, but a big, full-size sedan just isn't what people are ordering up these days. It's unfortunate to see it go, but we won't be broken up over it. Chevrolet Cruze We wouldn't rank the Cruze at the top of the compact car class, but if you were looking for a small, cheap American car, it was either this or the Focus. The Cruze had the potential to be a true small performance car if Chevy had ever wanted to make it into one. But sadly, we're seeing it bow out before Chevy ever tried to slot a hot engine and suspension in there to make it competitive with other hot hatches. A Cruze SS would have made enthusiasts take notice.