2007 Chevrolet Silverado 1500 2wd Ext Cab 143.5 Lt W/1lt 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.

GM recalls Chevy Express, GMC Savana over rollaway concern

The National Highway Traffic Safety Administration has issued a recall notice for a small number of General Motors fullsize vans due to possible rollaway concerns. On certain 2013 Chevrolet Express and 2013 GMC Savana models, it is possible to remove the key from the ignition without the shifter being in park.
Only 980 total units are being affected by this recall, and GM is fixing the issue by replacing the ignition cylinder and associated keys. Affected Chevy vans were built during most of November and December while its GMC counterpart was only built for a week in November. The recall goes into effect on January 23, and to find out if your vehicle applies to the recall, the GM and NHTSA contact numbers can be found on the official recall notice, which is posted below.

The Tesla Model S was the best-selling EV of 2015

According to numbers crunched over at Hybrid Cars, the Tesla Model S was the best selling pure electric vehicle last year with 50,366 deliveries. These numbers might not tell the whole story, since Tesla reports deliveries made in 2015 that might have been sold in a different calendar year, while other makers are tallying sales. However, it's inarguable that the Model S ended up in more worldwide driveways than the second-place Nissan Leaf, which did about 43,000 sales. In the US alone, Leaf sales were down 42.8 percent year-on-year, from 30,200 in 2014 to 17,269 last year, and that decline also increased throughout the year. That marks a great finish to a great start to 2015, when Tesla took the lead in EV sales in the US for the first quarter. On top of that, as of last year the Model S becomes the second-best selling EV ever, with 107,148 deliveries since the middle of 2012. It trails the Nissan Leaf, with well over 200,000 worldwide sales. The Chevrolet Volt/Opel Ampera combo takes a close third, with about 106,000 sales. The Nissan and Chevy rivals both launched at the end of 2010, a 16-month head start on the Tesla. Down the charts, the Mitsubishi Outlander PHEV which continues to be forbidden fruit for our market notched 39,000 sales. The BYD Qin PHEV sold 31,898 examples in China, and BYD would take the overall victory from Tesla with 58,728 deliveries if you counted all of its EV and PHEV production, such as its electric buses. The BMW i3 nabbed fourth place with 24,057 global sales. In 2011 the Munich automaker said it wanted to sell 30,000 i3s annually by 2014, but by the time the car launched the company considered 15,000 annual sales 'great for now,' so the 2015 number seems a fine place to wind up. Related Video: News Source: Hybrid Cars Green BMW Chevrolet Mitsubishi Nissan Tesla