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GM Recalling 370,000 Trucks For Fire Risk

DETROIT (AP) - General Motors is recalling 370,000 Chevrolet Silverado and GMC Sierra pickups from the 2014 model year to fix software that could cause the exhaust components to overheat and start a fire. The recall includes 303,000 trucks in the U.S. and 67,000 in Canada and Mexico. All of the trucks involved have 4.3-liter or 5.3-liter engines. GM said eight fires have been reported, but no injuries. One garage was damaged, the company said. All of the incidents occurred in cold weather. The company is asking customers not to leave their trucks idling unattended. GM dealers will reprogram the software for free. The company will inform owners starting Jan. 16. The major recall announcement, which came on Saturday, marred the Silverado's winning of the 2014 North American Truck of the Year Award at the Detroit Auto Show on Monday. Related Gallery Our Favorite Cars For Winter View 11 Photos Recalls Chevrolet sierra

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

Six-week production shutdown planned for 2016 Chevy Volt

It's no surprise that GM is winding down production of the first-gen Chevy Volt as it prepares to start building the second-gen for a launch in the second half of this year, but for now, things are proceeding as planned, according to Chevrolet spokesperson Michelle Malcho. Malcho told AutoblogGreen that GM "is still making first generation Volt" and that there has been no announcement about when that will change. The only details she would divulge is that, "It will be this summer." "Halting Chevrolet Volt production in anticipation of the all-new 2016 model year is a smart move for GM," Akshay Anand, an analyst at Kelley Blue Book's KBB.com, said in a statement. "[The move] allows for less inventory and incentives on the outgoing model. Hybrid and alternative fuel vehicle sales have been declining for some time now, with gas prices well below the summer prices of 2014." Volt production will cease in the weeks before the traditional two-week auto plant shutdown over the July 4 holiday. A high inventory of Volts is a factor in the production cuts, but not the only one, Malcho said. The plant construction, engineering changes and pre-production plans for the new Volt and CT6 all were part of the decision, she said. Nationwide, there is about a 200-day supply of Volts on dealer lots (roughly 100 days in California, the car's biggest market), according to the Detroit Free Press, which says there will be a six-week retooling period (twice as long as normal, but other sources say the shutdown will be four weeks long) at GM's Hamtramck plant this summer to get ready for the second-gen model. The 2016 Volt will get an increase in all-electric range to 50 miles and will then get 41 miles per gallon when the battery runs out. It also has a fifth seat that straddles the battery tunnel and a larger li-ion battery. Related Video: The AP contributed to this report. Featured Gallery 2016 Chevy Volt View 16 Photos News Source: GM, Detroit Free Press Green Plants/Manufacturing Chevrolet Electric Hybrid