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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.

Chevy Volt replacement battery cost varies wildly, up to $34,000

There's a growing hubbub in the plug-in vehicle community over what looks like some ridiculously cheap replacement batteries for the Chevrolet Volt going up for sale. GM Parts Online, for example, is selling a replacement Volt battery with an MSRP of $2,994.64 but, with an online discount, the price comes down to $2,305.88. For the 16-kWh pack in the 2012 Volt, that comes to a very low $144.11 per kilowatt hour (kWH). But is it a real deal? How can it be, when a Chevy dealer may quote you a price of up to $34,000 to replace the pack? For a 16-kWh Volt pack, $2,305.88 comes to a very low $144.11 per kWh. But is it a real deal? Battery packs in alternative propulsion vehicles are usually priced by the kWh and, historically, they've been thought to be in the range of $500-per-kWh for OEM offerings. Since automakers are understandably secretive about their costs, we still don't know what the real number is today, but we do know it varies by automaker. Tesla, for example, has said it pays less than $200-per-kWH at the cell level but, of course, a constructed pack would be more. Whatever is going on, li-ion battery prices are trending downward. So, $144.11 certainly sounds great, but what's the story here? Kevin Kelly, manager of electrification technology communications for General Motors, reminded AutoblogGreen that GM Parts Online is not the official GM parts website and that, "the costs indicated on the site are not what we would charge our dealers or owners for a replacement battery. There would be no cost to the Volt owner if their battery needs replacement or repair while the battery is under the eight year/100,000 mile limited warranty coverage provided by Chevrolet." A single price tag also can't be accurate for everyone, Kelly said. "If the customer needs to have their battery repaired beyond the warranty, the cost to them would vary depending on what needs to be replaced or repaired (i.e. number of modules, which specific internal components need replacement, etc.)." he said. "So, it's hard for us to tell you exactly what the cost would be to the customer because it varies depending on what might need to be repaired/replaced. As a result, the core charge would vary." But, is the $2,300 price even accurate for anyone? Thanks to a reader comment, we see that this similar item on New GM Parts makes it look like the lithium-ion modules that Kelly mentioned – where a lot of the expensive bits are – are not included.

These are the cars being discontinued for 2024 and beyond

While we get new and updated car models every year, its inevitable that we'll need to say goodbye to some nameplates as well. This time around, it feels like we have confirmation or reports of an unusually large number of vehicles being discontinued in 2024 and the coming years.  We shouldn't be surprised. A large number of automakers are approaching their various target dates for electrification of their fleets. As such, some beloved internal combustion cars are going away, sometimes with appropriate fanfare like special editions. Others are slinking away quietly, killed by slowing sales and changing consumer trends. Of course, the end of production doesn't necessarily mean permanent death. Some of these models could be resurrected in later years ... and probably as an EV. With that in mind, here are the vehicles that are being discontinued in 2024 and beyond.   Alfa Romeo Giulia Quadrifoglio and Stelvio Quadrifoglio Alfa Romeo ended the production of its combustion-only Quadrifoglio models in April 2024 as the Italian automaker moves toward an electrified future. This isn't the end of the Quadrifoglio entirely, though, with Larry Dominique, Alfa Romeo senior vice president and head of North America, writing, "I look forward to presenting the next chapter in the four-leaf clover’s journey."   Chevrolet Camaro GM is ending production of the Chevy Camaro after 2024, but is sending it off in style with a CollectorÂ’s Edition. WouldnÂ’t it be cool, though, if Chevy brought it back as an EV?   Chevrolet Malibu Rumors of its demise have been around for a while, but now itÂ’s official. GM will end production of the Chevy Malibu in November of 2024. The assembly line in Kansas will be retooled to build the replacement for the Chevy Bolt.   Dodge Durango The three-row Durango is slated to be replaced by the Stealth nameplate after 2024. The Durango name could make a comeback later, according to rumors, on a body-on frame SUV based on the Jeep WagoneerÂ’s platform.   Ford Edge This is the last year for the Edge in the U.S., with the final unit rolling off the assembly line in April. On sale since 2007, the Edge topped 100,000 sales in all but three full years of production.   Ford Escape Newly refreshed for the 2023 model year, FordÂ’s popular Escape compact SUV is reportedly taking its leave in 2025 in order to usher in — you guessed it — an EV in its place.