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NHTSA closes 4-year GM investigation, issues common sense advisory [w/video]

Since January 2011, the National Highway Traffic Safety Administration has been investigating a possible problem with corroding brake lines in General Motors' GMT800-platform models, like the Chevrolet Silverado and Suburban and GMC Sierra, in states with salt on their roads in the winter. However, as opposed to launching a full recall of millions of vehicles, the government is issuing a common-sense safety advisory to all drivers in snowy states to keep their vehicle's undercarriage clean. It even has a video explaining things. "Older-model vehicles, often driven in harsh conditions, are subject to corrosion over long periods of time, and we need owners to be vigilant about ensuring they, their passengers, and others on the roads are safe," said NHTSA Administrator Mark Rosekind in the announcement of the end of the investigation. The agency was clear in its report that "brake line corrosion seen in the GM vehicles was not unique," and the government "has not identified a defect that would initiate a recall order." Instead NHTSA is advising drivers, especially those of vehicles from before 2007, to wash their vehicle's undercarriage in the winter and spring to remove salt or other de-icing chemicals. It also recommends regular checks by a mechanic to make sure everything is in proper order. According to the investigation documents, for just the GMT800 platform models, NHTSA found 3,645 complaints of brake line corrosion, which included allegations of 107 crashes and 40 injuries. The issue was found to be more common in vehicles over 10 years old. GM has released a statement (embedded below) that the company "supports the consumer advisory from NHTSA urging regular maintenance and care of brake lines on older vehicles." NHTSA Closes Investigation into Brake-Line Failures NHTSA 13-15 Thursday, April 9, 2015 Agency issues safety advisory on preventing undercarriage corrosion WASHINGTON – The Department of Transportation's National Highway Traffic Safety Administration (NHTSA) today issued a Safety Advisory and consumer video encouraging owners of model year 2007 and older trucks, SUVs and passenger cars to inspect brake lines and thoroughly wash the underside of their vehicles to remove corrosive salt after the long winter in order to prevent brake-line failures that increase the risk of a crash.

2016 Chevy COPO Camaro wears drag to SEMA [w/video]

Attendees to this year's SEMA Show get to be the first to check out Chevrolet's latest COPO Camaro that's now based on the new, sixth-generation model. As before, they packs a bevy of racing modifications to rocket down drag strips across the country. All of the interested customers might not get one of these hand-built machines, though, because Chevy is sticking with the tradition of only building 69 of them for 2016. Devised to compete NHRA Stock and Super Stock Eliminator classes, the latest COPO Camaro features the lighter, more rigid platform of the sixth-gen model. Buyers can choose from an array of V8s for power, including a supercharged 350-cubic-inch engine, a naturally aspirated 427, or an LT-based 376. All of them come with a race-prepped Turbo 400 three-speed automatic, solid rear axle, and adjustable suspension. The COPO on display for SEMA wears custom styling from drag racer Courtney Force that combines a Red Hot and black color scheme with her name slashing across rear fender. This one also packs a concept 350-cubic-inch V8 with a 2.9-liter Whipple supercharger. If you're interested in owning it, the car will cross the auction block at a Barrett-Jackson sale in 2016, and the proceeds will go to the United Way. Related Video: CHEVROLET INTRODUCES GEN SIX COPO CAMARO Courtney Force-designed show car to be auctioned for United Way LAS VEGAS – With assistance from NHRA Camaro Funny Car driver Courtney Force, Chevrolet introduced the Gen Six COPO Camaro today at the SEMA Show. After visiting the COPO build center, Force collaborated with Chevrolet designers to create a custom appearance for the 2016 COPO Camaro SEMA show car. It will be auctioned at a Barrett-Jackson sale in 2016, with the proceeds going to United Way. Chevrolet will build 69 COPO Camaro race cars for 2016, extending the production legacy that began in 2012 with the fifth-generation Camaro. Like the previous editions, the new COPO Camaro is designed for NHRA's Stock and Super Stock Eliminator classes. "With the new Gen Six Camaro as its foundation, the 2016 COPO Camaro begins the next chapter of an historic racing legacy," said Jim Campbell, Chevrolet U.S. vice president of Performance Vehicles and Motorsports. "It's great to have Courtney Force on Team Chevy and to work with her on the design of the new COPO Camaro show car.

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