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Saturn Vue ignition switch leads to new group of GM recalls totaling 312k

General Motors has another spate of recalls to announce. This time they cover 312,280 vehicles worldwide, including 269,041 of in the US, in a total of six campaigns. In 2014, the automaker has recalled 29,079,765 vehicles worldwide, with 25,754,356 of those in the US.
The largest among them covers 215,243 units of the Saturn Vue from 2002-2004 model years worldwide, 202,115 in the US. It's possible for the for the key to be removed even when the ignition isn't in the OFF position. The company knows of two crashes and one injury caused by this problem. Dealers are checking the parts and replacing the ignition cylinder and key set, if necessary.
Next is 72,826 models worldwide (48,059 vehicles in the US) of the 2013 Cadillac ATS four-door sedan, 2013 Buick Encore and 2013 Chevy Trax in Canada. It's possible that the for lap belt pretensioner to retract but not to lock, which could increase occupant movement during a crash. Both front, outboard lap belt pretensioners are being replaced, and a stop-sale is in effect on unsold models until the problem is repaired. There are no known crashes or injuries, though.

Cadillac upgrades ATS sedan to match new coupe

The big news when it comes to the Cadillac ATS for 2015 is surely the addition of the new coupe model, but that doesn't mean that Cadillac has forgotten about the sedan as well. In fact GM's luxury brand has rolled out a few choice enhancements for the four-door to bring it more in line with the new coupe.
Among those changes that we spotted a couple of weeks ago is a new front fascia that incorporates the brand's new wreath-less emblem, and a sleeker front bumper. The interior has been upgraded as well with new trim options as well as some new tech including Siri Eyes Free functionality, dictated text messaging and optional inductive smartphone charging.
Though the ATS Coupe does away with the base engine, sedan buyers can still opt for the 2.0-liter four with 202 horsepower and 191 pound-feet of torque. The 3.6-liter V6 carries over unchanged at 321 hp and 275 lb-ft, but the 2.0-liter turbo four gets the upgraded torque rating of 295 lb-ft (the highest in the range) to go with its 272 hp. Some new color choices are also among the upgrades you can read more about in the press release below.

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