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GM recalls full-size truck, SUVs and vans over faulty shifter mechanism

Twelve different General Motors vehicles from the 2013 model year, up to 54,686 units in total, are being recalled over two potential issues with their steering columns. The models in question, all full-size trucks, SUVs or vans, are the: Cadillac Escalade, Escalade ESV, Escalade EXT, Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe, and GMC Savana, Sierra, Yukon and Yukon XL.
The affected vehicles were built with a fractured parking lock cable or "a malformed steering column lock actuator gear in the lock module assembly." As a consequence, they could shift out of park without the brake pedal being applied or with the key removed or in the off position.
A bulletin from the National Highway Traffic Safety Administration indicates that the recall should begin on January 17. GM will notify owners, at which time they can take their vehicles to their dealers for repair free of charge. Have a look at the bulletin below for more information.

2020 Lincoln Corsair vs 2020 Cadillac XT4 | How they compare on paper

The 2020 Lincoln Corsair compact crossover was introduced this year to replace the aging MKC. Our first impressions are that it's a thoroughly competent luxury machine, but where it fits in the market is interesting. Given its size and price tag, the Corsair basically slots in-between compact segments, with vehicles like the Audi Q3 below and Audi Q5 above. It's a distinctive position to be in, but not a unique one, as there's another comparably sized and priced SUV -- and an American rival, no less. The Cadillac XT4 was launched just last year to be its company's smallest crossover, boasting compelling design and ample technology features.  So which is better? To give you some idea, let's take a look at each vehicle's horsepower, torque, fuel economy, space, pricing and some slightly more subjective aspects about their luxuriousness and feature sets. You'll find all the nitty gritty numbers below, followed by more detailed analysis. And if you'd like to compare other luxury crossovers, be sure to check out our comparison tool. Engines, drivetrains and driving impressions Both the Corsair and XT4 come standard with turbocharged 2.0-liter four-cylinder engines, but the Corsair's is more potent with 250 horsepower and 275 pound-feet compared with the 237 horsepower and 258 pound-feet of the Cadillac. And to seal the deal, the Corsair has an optional turbo 2.3-liter engine with 280 horsepower and 310 pound-feet of torque. That's not only vastly better than the Cadillac, but one of the most powerful outputs in the compact luxury SUV segment. Both vehicles have standard front-wheel drive with optional all-wheel drive on the base engines. The 2.3-liter Corsair has all-wheel drive standard. The Cadillac does boast an extra cog in its transmission over the Corsair's eight-speed automatic, but there's not necessarily an advantage or disadvantage to be gleaned from that. When it coes to fuel economy, the Cadillac is victorious with a 26 mpg combined rating for the front-drive model, with the front-drive 2.0-liter Corsair coming just behind with 25 mpg combined. It's a three-way tie for third with the all-wheel-drive XT4, all-wheel-drive 2.0-liter Corsair and 2.3-liter Corsair all returning 24 mpg combined. Of course, the all-wheel-drive Corsairs have a small advantage here in that it delivers more power and torque than the Cadillac with the same fuel economy.

GM patent reveals new two-stage turbocharger

Modern turbochargers may be some of the best ever made, but performance is something that engineers are always trying to improve. According to GM Inside News, General Motors (GM) is hoping to alleviate some of the negative aspects of a two-stage turbocharger setup with a newly-patented design. The patent, that was filed on May 19, 2016, reveals a clever bypass system that allows the engine, a four-cylinder unit, to optimize both the low-pressure and high-pressure inlets for its respective functions. According to the filing, a conventional two-stage turbocharger setup is engineered to allow both turbines to operate simultaneously at low and mid engine speeds. At high engine speeds, only the low-pressure turbine works. The setup can't isolate either the low or high pressure side, which can impair low-end performance. GM's new two-stage turbocharger setup looks to eliminate this by linking the high-pressure turbo to the exhaust manifold through the high-pressure inlet duct. The low-pressure turbo is attached to the high-pressure turbo by a low-pressure inlet duct, which is linked to a connecting channel. A single actuator that is housed in the exhaust manifold creates a bypass that can opens the high-pressure inlet or close the connecting channel. Depending on what the engine load and speed is, the ECU guides the actuator—a single rotating spindle with discs corresponding to flanges on the high and low pressure sides—to isolate one of the two turbos. Isolating the turbos allow the respective inlets to be engineered for the best possible fluid dynamic performance. The setup should increase performance and decrease lag. There's no word on what car this setup will make an appearance on, but it will most likely be used in premium vehicles before trickling down to the rest of GM's vehicles. Related Video: News Source: GM Inside News, AutoGuide via GM Authority Cadillac Chevrolet GM Technology Sedan turbo patent engine turbocharging