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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.

Weekly Recap: Cadillac's crossover blitz hinges on the 2017 XT5

Cadillac's aggressive new cadence of crossovers begins next spring with the arrival of the 2017 XT5, the first of four new utility vehicles that Cadillac will unleash in a bid to win more customers and revitalize its image. The XT5 replaces the aging SRX, and it's the first SUV to use the brand's new naming scheme (cars will use the corresponding CT prefix). Billed as the cornerstone of Cadillac's remade crossover lineup, the XT5 will join showrooms right after Caddy's new flagship, the CT6 sedan. It will be on display next week at the Los Angeles auto show after first appearing this month at the Dubai motor show. "It's pivotal to our ongoing growth, which is why we've developed XT5 from the inside out to provide customers more space, more technology, more luxury, and more efficiency," Cadillac president Johan de Nysschen said in a statement. "Pivotal" is almost understating the XT5 and the red-hot midsize crossover segment. The SRX is Cadillac's top seller in 2015, posting a 25-percent increase and its 56,732 units (up 25 percent) are more than one third of the brand's 141,090 sales this year. Yes, the totals have been partially incentive-fueled, and Cadillac put an average of $7,225 on the SRX's hood in October, according to TrueCar data. Still, it's an impressive performance for any vehicle, especially one that's had few major changes since the new generation launched as a 2010 model. "The SRX has been selling very well, given how late in the lifecycle it is," AutoPacific product analysis manager Dave Sullivan told Autoblog. It outsold the all-new MKX last month and really only trails the Lexus RX. This is the volume model for Cadillac and dealers need this to be a grand slam, not just a home run." Cadillac is adamant the XT5 isn't an SRX re-skin. It has a new chassis, more interior room, and adds features like Apple CarPlay and Android Auto. Thanks to a new structure, the XT5 sheds 278 pounds compared with its predecessor, which should improve fuel economy and driving character. The crossover uses General Motors' latest 3.6-liter V6 rated at 310 horsepower and 270 pound-feet of torque, and it is fortified with variable-valve timing, cylinder-deactivation, and stop-start features. The V6 will team with an eight-speed automatic transmission and a twin-clutch all-wheel-drive system than can summon all of the torque distribution to the front or rear axles. Cadillac will also sell a 2.0-liter turbo four-cylinder model in China.

Recharge Wrap-up: BMW to test autonomous cars, Korea bans sales of BMW, Nissan, Porsche models

BMW will test autonomous cars on public roads by the second half of 2017. The German automaker, with partners Mobileye and Intel, will operate a fleet of 40 self-driving vehicles using a "scalable architecture" that will be made available to other automakers. The partners plan to offer products ranging from key components to "a complete end-to-end solution" for autonomous driving. Since parting ways with Tesla, Mobileye also recently announced it would provide its technology to Lucid Motors. For BMW, it all leads up to its fully autonomous iNext model slated for introduction in 2021. See the video above, and read more in the press release from Intel. South Korea has banned the sale of certain models from BMW, Nissan, and Porsche over emissions cheating. Following an investigation, regulators determined emissions testing documents to be falsified. The country's Ministry of Environment has fined the three automakers a total of $5.9 million, and revoked the certification of 4,523 vehicles across banned 10 models. Six of the models were still on sale, while the other four have been discontinued. Read more from Automotive News Europe. China's prices for the Cadillac CT6 Plug-in are significantly higher than those announced for the US. The plug-in hybrid version of the luxury sedan recently went on sale with the two variants priced at RMB 558,800 and RMB 658,800. At the time of this writing, that's $80,420 and $94,812. Cadillac announced it would bring the CT6 Plug-In Í– which is built in China – to the US in the spring of 2017, starting at $76,090 before federal and local tax incentives. Hybrid Cars points out that China's own generous incentives could help to make it more competitive. The offering of a charger with free installation as well as an eight-year warranty on the electric powertrain should help, too. Read more at Hybrid Cars. A Connecticut court has ruled in favor of Tesla's gallery showroom in Greenwich. Last May, the Connecticut Automotive Retailers Association brought the suit to block the showroom on Greenwich Avenue, which has now been dismissed by the Connecticut Superior Court. Tesla cannot offer test drives, sell cars, or operate a Supercharger at the location, but it can sell other branded items and educate the public about its vehicles. It's possible that the issue of Tesla's direct sales model could come up again this year in Connecticut state legislature. Read more at Teslarati .