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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 ATS Coupe headed for Detroit reveal

Cadillac wouldn't be Cadillac without its two-door models. But the XLR has been discontinued for over four years now, the Elmiraj concept may never see production and the future of the CTS Coupe is still up in the air. That leaves just the ELR, which may not be conventional enough for traditional Cadillac coupe buyers. Fortunately a new coupe is coming along to fill the void.
According to Edmunds, Cadillac will reveal the new ATS coupe just a couple of months from now at the Detroit Auto Show. Expected to mechanically mirror the existing ATS sedan, the new coupe will also more conventionally resemble its four-door counterpart than the CTS, whose coupe version was distinguished by a rakishly sloping roofline.
Expect the same choice of engines to carry over, with a 2.5-liter four serving as the base engine, and both a 2.0-liter turbo four and a 3.6-liter V6 offering more power for those looking for that extra bit of oomph. Following the Detroit reveal, sources anticipate the ATS coupe to go on sale next summer.

2014 Cadillac CTS debuts new design, twin-turbo power, Vsport model [w/video]

If ever there were a Cadillac to truly rival the world's best, this could be it.
With every new model, Cadillac indeed gets closer and closer to actually performing at the top of its class, rivaling those crafty Germans at their own sport/luxury sedan game. The best example yet of Cadillac's efforts to challenge the world came last year, when we met the 2013 ATS - a vehicle that we praised for its on-road dynamics and interior refinement, and later went on to be named North American Car of the Year.