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GM warning 800,000 owners that their cars may need oil changes more frequently than they say

The days of changing your engine oil every 3,000 miles are long gone thanks to most cars having automatic oil monitoring systems, but about 800,000 General Motors vehicles apparently have incorrect monitoring software that is leading to premature engine component wear. According to Autoweek, certain 2010-2012 Buick LaCrosse, Regal, Chevrolet Equinox and GMC Terrain models equipped with 2.4-liter four-cylinder engines could be going too long in between oil changes resulting in a higher-than-normal number of warranty claims for the engine's balance chain. The balance chain links the balance shaft to the crankshaft, and a worn one can produce higher noise levels.
As a fix, GM dealers will be reprogramming the software for the monitors in an effort to reduce the interval between oil changes, which varies based on driving habits and conditions. Through February 2015, the software update will be done at no cost to vehicle owners, but since this is not a recall, after that point, it will be up to the discretion of dealers as to whether or not they will charge for the service. What isn't immediately clear is whether GM plans on giving assistance to out-of-warranty customers who are experiencing engine issues from the worn chain.

2017 Chevrolet Trax brings its fresher face to Chicago

The 2017 Chevrolet Trax's facelift does wonders for the compact crossover's looks. There's nothing overly offensive about the model's current design, but it's rather drab, especially at the front. As you can see from these live photos from the Chicago Auto Show, the revised Trax simply looks more modern than the current model. It now wears narrower wraparound headlights that integrate nicely with the upper level of the grille. The lower portion of the front end gets a more angular shape, and there are big crevices for the foglights. The rear also has small revisions, including new taillights and tiny changes to the bumper. With this refresh, Chevy has brought its little CUV's looks closer in style to the brand's stalwart sedans, the Cruze, Malibu and Impala. Inside, the Trax now features analog instruments for the speedometer and tachometer, but there's still a big screen on the right side to display vehicle information. The CUV also gets Chevy's seven-inch MyLink infotainment system that buyers can option with Apple CarPlay, Android Auto, and 4G LTE support. Active safety tech like side blind zone alert, rear cross traffic alert, forward collision alert, and lane departure warning are available on the 2017 model, too. While the 2017 Trax looks a lot better, it's the same vehicle mechanically. It won't arrive at dealers until this fall, but you can check one out now in our gallery above. Related Video: Chevrolet Introduces 2017 Trax Fresh design, premium interior complement safety, connectivity enhancements CHICAGO – Building on its early success and the rapid growth of the segment, Chevrolet today introduced the 2017 Trax – a more expressive take on one of America's best-selling small SUVs. Contemporary design elements, including an all-new front-end appearance, and a new premium interior compose the visual updates, while new available active safety features and a new infotainment system – with available Apple CarPlay and Android Auto compatibility – expand its range of customer-focused technologies. "In the fastest-growing segment, Chevrolet Trax's momentum is sure to continue with great design enhancements, premium details, and the latest technologies," said Steve Majoros, director of marketing, Chevrolet Cars and Crossovers.

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.