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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 chief says ATS convertible, wagon on the table

What we do know is that the ATS will wear at least one more bodystyle. That comes from Cadillac head Bob Ferguson, who answered "Absolutely" when Automotive News asked him about the possibility of another variant. What we don't know is what that bodystyle or styles will be.
We now have a sedan and coupe ATS, there's supposedly a V sedan coming. After that, a convertible is a likely option given that the man who just became the global product honcho at General Motors, Mark Reuss, admitted to having one already designed in 2012. The decision on it can't get out of the underworld and a wagon is the other option, but the droptop would seem to make the most sense if one considers the competitive set: the BMW 4 Series and Audi A5 convertibles are hot property and Mercedes is bringing a C-Class convertible. Meanwhile wagons are the sentimental utility vehicles that, refusing to die, seem forever destined for life support... CTS Sport Wagon, anyone?
Based on Ferguson's statements, it appears that what Cadillac definitely won't do is play model variant catch-up with the European luxury brands it has spent years hunting down, telling Automotive News, "We want to keep our focus on a limited number of vehicles and do them very well."

GM laying off 510 amidst slow Cadillac, small car sales

General Motors is laying off about 510 workers from two factories beginning in January, and it could be months before the automaker needs some of that latent capacity to come back on line. A combination of poor sales and high dealer inventories are prompting the cutbacks, according to Automotive News.
The largest changes come at GM's Lansing Grand River plant, where the Cadillac ATS and CTS are made. An entire shift of about 350 workers is being laid off, but the automaker hopes to find positions for some of them at other nearby factories. The decision leaves just a single shift building vehicles there. According to Automotive News, the move is partially spurred by Johan de Nysschen's plan to make Cadillac a more exclusive brand.
The lost shift will likely return for production of the next-generation Chevrolet Camaro at the plant, according to the report, but GM isn't saying when that will be. A previous announcement from the Canadian Auto Workers union indicated that the Oshawa, Ontario, factory would lose the coupe in late 2015 or early 2016.