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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.

Safety group pans GM’s new Marketplace in-dash shopping

When it comes to our cars, is the Internet of Things a godsend? Or a hidden menace that will create more problems than it will solve? On the same day General Motors announced it will equip newer-model cars with its in-dash Marketplace e-commerce app, a prominent safety group was shooting it down. National Safety Council President Deborah Hersman tells Bloomberg the technology will only contribute to distracted driving and hurt efforts to stem the tide of rising auto fatalities, which grew 5.6 percent to more than 37,000 in the U.S. in 2016. The National Highway Traffic Safety Administration says distracted driving was responsible for 3,477 fatalities and 391,000 injuries in 2015, the most recent year for which it has data. "There's nothing about this that's safe," Hersman told Bloomberg. "If this is why they want WiFi in the car, we're going to see fatality numbers go up even higher than they are now." Marketplace, developed with IBM, will allow drivers — or more often, one hopes, their passengers — to order coffee or food, find gas stations and reserve hotel rooms from their dashboard screens. The technology is set to be uploaded automatically to nearly 1.9 million GM vehicles model-year 2017 and later that are equipped with WiFi hotspots and compatible systems. By the end of 2018, about 4 million Chevrolet, Buick, GMC and Cadillac vehicles will be equipped with Marketplace. The app will debut with a limited number of participating retailers, including TGI Fridays, Shell, Exxon Mobil and Starbucks, with more likely to join later. Online retail giant Amazon is also partnering with automakers such as Ford to bring e-commerce capabilities inside the car through its Alexa personal assistant. While convenience is nice, one other thing is becoming clear as the IoT wedges its way into our cars: It's taking aim at some decidedly first-world problems.Related Video: Image Credit: GM Buick Cadillac Chevrolet GM GMC Technology Infotainment in-car entertainment marketplace e-commerce

Cadillac ELR production has stopped, Chevy Bolt coming in Oct.

It looks like General Motors' Cadillac ELR extended-range plug-in is out as the automaker prepares to go all in on the Chevrolet Bolt electric vehicle. The Caddy officially stopped production in February, Hybrid Cars says, citing Cadillac Product Communications Manager David Caldwell. There is still a "small quantity" of the coupe at dealerships, but this take on mashing up "luxury coupe" with "green vehicle" has about run its course. Caldwell and Johan de Nysschen, president of General Motors' Cadillac division, had already confirmed earlier this year that the ELR, which was first available as a 2014 model, wouldn't have any further generations, though weren't specific on when production would stop. The ELR uses an upgraded version of the first-generation Volt's powertrain to move the 4,000-pound beast, and while the Volt is now in its second generation (and this year's sales have more than doubled from a year earlier as a result), the ELR never received a similar upgrade. The ELR sold just 357 units through April. As a result, the ELR sold just 357 units through April, down almost nine percent from a year earlier. In all of last year, 1,024 ELRs were sold, compared to more than 15,000 units for the Chevy Volt, and that's after the ELR's price was cut by about $9,000 last April. The car also got about a 25-percent increase in power, but that didn't seem to do the trick when it came to boosting demand, even with the available $7,500 federal tax credit. Meanwhile, Hybrid Cars is reporting that the 2017 Bolt, which will feature a single-charge range of about 200 miles and is expected to retail for about $35,000, is likely to start production at GM's Orion Assembly Plant in October. While you wait, if you're already feeling nostalgic, check out our impressions of the ELR here. Related Video: Featured Gallery 2014 Cadillac ELR Review View 48 Photos News Source: Hybrid Cars Green Plants/Manufacturing Cadillac Coupe Hybrid Chevy Bolt cadillac elr elr extended-range plug-in bolt