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GM claims it's first to sell million 30+ mpg vehicles

As we continue to put together all the data for the year-end edition of By The Numbers, General Motors has announced that it sold more than a million vehicles in the US last year that achieved at least 30 miles per gallon on the highway. More impressively, GM managed this feat using multiple strategies including small vehicle size, turbocharged engines and hybrid or plug-in technologies across four brands (Buick, Cadillac, Chevrolet and GMC) accounting for 13 separate models. This number will grow even more in 2013 thanks to cars like the all-electric Spark, the diesel Cruze, the range-extended Cadillac ELR and the Buick Encore compact CUV.
GM's small car sales were up 39 percent last year helping to attain this million-sales mark for 30-mpg models, and almost 40 percent of all GM sales consisted of cars with fuel-efficient I4 engines. In regards to more advanced means of improving fuel economy, GM says that it plans on having 500,000 vehicles with "some form of electrification" on the road by 2017.
Scroll down for the full list of GM's million 30+ mpg cars as well as an informative press release.

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.

2015 Chevy Colorado takes Motor Trend Truck of the Year calipers [w/videos]

The final winner of Motor Trend's prestigious Golden Calipers has been named, with the 2015 Chevrolet Colorado taking the title of 2015 Truck of the Year, likely shocking those who thought Ford's all-aluminum, next-generation F-150 would take the crown. But win the Colorado did, beating not only the new Ford, but two other brutish Blue Ovals in the F-450 and Transit. The midsize pickup also bested its brethren from General Motors, beating the heavy-duty Chevy Silverado 3500, GMC Sierra Denali 2500 and the GMC Canyon, the Colorado's fraternal twin. After an unprecedented two-year stint with the Golden Calipers, Ram sat this year's awards out. Most impressive about the Colorado's victory isn't that it simply beat the US market's other trucks, it did so with a unanimous vote. Praise from MT's editors focused on the trucklet's price, spacious interior, fit and finish and performance. Former Autoblog staffer Jonny Lieberman called the Colorado's steering the best he'd "ever experienced on any truck, full stop," in MT's awards article. "After days of testing, hundreds of miles on the road, and our most rigorous truck testing program to date, our editors unanimously selected the Chevy Colorado as our 2015 Truck of the Year," said MT boss Edward Loh. "Colorado is a smart, capable, and refreshingly honest truck that makes a strong value and efficiency statement. It's perfectly sized and suited for the needs of many of today's truck users." The Colorado joins the 2015 Volkswagen Golf and 2015 Honda CR-V among Motor Trend 2015 award winners. Scroll down for video commentary from General Motors CEO Mary Barra, Loh and a clip of the Golden Calipers being handed over. Also, check out GM's full press release on its big win. The video meant to be presented here is no longer available. Sorry for the inconvenience. The video meant to be presented here is no longer available. Sorry for the inconvenience. The video meant to be presented here is no longer available. Sorry for the inconvenience. MOTOR TREND Names Chevrolet Colorado 2015 Truck of the Year Midsize pickup outclasses competition in design, engineering, efficiency, safety and more 2014-12-03 EL SEGUNDO, Calif. – After its most comprehensive truck evaluation program in history, MOTOR TREND has selected the Chevy Colorado as its 2015 Truck of the Year®. MOTOR TREND's Truck of the Year program is only open to all-new or significantly updated trucks and vans for the upcoming model year.