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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 SRX likely to see next-gen built in China

Here's some shocking news to no one: People love crossovers, including those living in China. Since introducing the Cadillac SRX there in 2009, the model's sales have gone through the roof. Now, the brand is considering moving some production of the next-generation model in China to eliminate import tariffs and make it an even bigger player in the market.
According to a recent report in The Wall Street Journal, the crossover is leading Cadillac's Chinese growth, despite its US-equivalent price of over $67,000 after the country's high import tariffs. The CUV's sales are up 23 percent there so far this year, and it's responsible for over 40 percent of the brand's sales. John Stadwick, General Motors' VP of sales, service and marketing in China, told the WSJ that GM could "very possibly" build the next-gen model there.
The SRX is Cadillac's golden goose in China, and it just keeps pushing the brand's sales forward. "It's the vehicle that took us out of being a small niche in the market," said David Caldwell, Cadillac Communications Manager, to Autoblog. Before the CUV, Caddy was selling a little over 20,000 cars a year there, but partially thanks to the crossover's success, the brand sold 50,000 vehicles last year and could reach 60,000 this year. "The SRX is the most popular Cadillac in that market," he said.

Cadillac Elmiraj sedan RWD flagship finally caught testing

While we still have no insight as to it being named Elmiraj, STS or some other permutation of the -TS nomenclature ("LTS" has apparently been registered by GM, as well), new spy shots give us proof positive that Cadillac is indeed hard at work on a rear-wheel-drive flagship model. Spied for the very first time in some north country testing, these shots provide a first look at the upcoming range-topper from Cadillac.
Impressively long and large bodywork ride atop new General Motors' corporate Omega rear-drive architecture here. Heavy cladding over camouflage may discourage finding any details, but the overall, sharp-edged and blocky design is clearly reminiscent of what we've seen on the new CTS and the recently debuted ATS coupe. A strong, wheels-at-each-corner stance helps emphasize the length of this stretched Caddy, and everything about the proportions seem spot-on for a new fullsize flagship for the brand.
It's quite possible that Cadillac will ultimately festoon this large sedan with detailing reminiscent of the original Elmiraj coupe, though thus far we've only seen prototypes wearing four-doors.