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How GM's grueling 24-hour test gets the kinks out of its performance cars

One of the biggest challenges automakers face when designing a high-performance car is making sure that it is both fast and reliable. For General Motors, any car that might be taken to the track by its owner - like the Corvette, Camaro Z/28 (shown above) and the Cadillac CTS-V, for example - undergoes a rigorous and strenuous 24-hour test by engineers at the Milford Proving Grounds, as pointed out by Car and Driver.
We've posted on this topic in the past - on a video showing the Camaro ZL1 being brutalized, for instance - but this article gives a more in-depth look at what actually happens behind the scenes... including what that poor ZL1 went through. Though the test isn't for 24 hours straight, the cars are pushed as hard as possible by some of GM's best drivers with only the brakes and tires replaced frequently.
We don't want to ruin the fun for you, but it is an interesting article that tells just some of what GM does to develop its sports cars. Check out the full article over at Car and Driver for the rest of the story.

Cadillac recalls 120k examples of ATS for fire risk

Cadillac is recalling a total of 119,339 units (96,145 in the US alone) of the 2013-2016 ATS sedan, because the coil antenna module that powers the rear defogger can overheat. The problem has been linked to four fires, but there have been no injuries, fatalities, or crashes, according to the automaker. During manufacturing, the antenna might have been produced with "critically weak terminal connectivity." If being cycled on and off often or used continuously, these faulty examples can overheat, leading to a fire in the driver's side rear pillar. According to the company, "less than 1 percent of the recalled vehicles are expected to have the condition." According to the National Highway Traffic Safety Administration (in a PDF), the fix is a reflash for the ATS' Electronic Climate Control module that automatically turns on the rear defogger when the engine starts. In addition, 2013 models keep the system on continuously at low temperatures at highway speeds and this is also being disabled in the update. The changes are meant to cycle the coil less often, but owners can still turn it on manually. Related Video: GM Statement: General Motors is recalling approximately 96,145 2013-16 model year ATS sedans in the U.S. Some of these vehicles may have been manufactured with critically weak terminal connectivity in the coil antenna module, which powers the rear defogger system. If the module has the condition and is subjected to excessive cycling or continuous operation, it may overheat and a fire may develop inside the rear pillar on the driver's side of the vehicle. Less than 1 percent of the recalled vehicles are expected to have the condition. GM is aware of four fires but no injuries, fatalities or crashes. Including Canada, Mexico and exports, the total population of the recall is approximately 119,339. RECALL Subject : Rear Defogger Coil Antenna Module may Overheat Report Receipt Date: SEP 03, 2015 NHTSA Campaign Number: 15V558000 Component(s): VISIBILITY Potential Number of Units Affected: 96,145 All Products Associated with this Recall Vehicle Make Model Model Year(s) CADILLAC ATS 2013-2016 Details Manufacturer: General Motors LLC SUMMARY: General Motors LLC (GM) is recalling certain model year 2013-2016 Cadillac ATS sedan vehicles manufactured April 23, 2012, to September 2, 2015. In the affected vehicles, the coil antenna module that powers the rear defogger system may generate excessive heat due to excessive cycling or continuous operation.

GM shows off 'digital vehicle platform' enabling more in-car tech and OTA updates

It appears to have dropped the sobriquet "Global B," but General Motors' new electrical architecture has bowed in drawings and video. This is the "digital vehicle platform" GM president Mark Reuss spoke to Reuters about in 2015, saying it would move a great deal of a vehicle's computer work to the cloud and enable over-the-air updates. Reuss took the microphone for the debut, too, saying, "Our new digital vehicle platform and its eventual successors will underpin all our future innovations across a wide range of technological advancements, including EVs and expanded automated driving." The system will go into production later this year, appearing in dealerships first either on the 2020 Cadillac CT5 or the mid-engined 2020 Chevrolet Corvette. Yes, these are the same electronics cited for delaying the launch of the C8 Corvette over excessive draw, security and getting the more-than-100 computer modules to communicate seamlessly. When Car and Driver asked about that, GM replied with "No comment." Volkswagen's having the same issues with the Mk8 Golf right now, though, so GM isn't alone, and this will be the new normal among OEMs for a while. What's certifiable is that the new architecture is robust enough to handle 4.5 terabytes of data per hour, which is five times what GM's current wiring can handle. And thanks to Ethernet connections of 100 Mbps, 1 Gbs and 10 Gbs, communication within and without the vehicle happens much faster. The advances mean better screen resolutions, better battery management for hybrids and electric vehicles, the capability for over-the-air updates and "functionality upgrades throughout the lifespan of the vehicle." Cadillac's Super Cruise has already been lined up as a leading candidate for constant improvements in the driving assistance suite, a key part of GM's "vision for a world with zero crashes, zero emissions and zero congestion." And whenever GM decides to take the plunge, it will mean a 48-volt electrical system. More than 300 specialists worked on the digital platform, and security was a huge part of the task. We've already heard that GM consulted with Boeing and military contractors on how to prevent hacking. The carmaker has an internal Product Cybersecurity group that reached out to the research community, and created a "bug bounty" program to crowdsource uncovering any flaws.