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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 will kill the plug-in ELR

Johan de Nysschen, president of General Motors' Cadillac division, says Caddy's ELR extended-range plug-in won't have any future generations, Automotive News (subs. req.) says. The publication previously reported that the car would be around for another couple of years, but even that's questionable, and the model could be yanked even sooner. Cadillac spokesman David Caldwell confirmed that there won't be a second-generation ELR. "Subsequent generations of the car will not be developed," he wrote in an e-mail to Autoblog. "It's available currently as a 2016 model, and there's no change to that status." The model debuted in late 2013 and used a version of the powertrain in the Chevrolet Volt. The main problem, of course, was that the car had a $76,000 price tag that proved too much for most automobile buyers to stomach. Last year, GM sold 1,024 ELRs, down 22 percent from 2014's totals. By comparison, the Chevy Volt moved more than 15,000 units, and that itself was still down 18 percent from year-earlier figures. The merciful end to the ELR shouldn't be much of a surprise, as Cadillac Chief Marketing Officer Uwe Ellinghaus went on the record in December of essentially calling the model a dud. It's a far cry from the excitement, though, that the concept model of what was then called the Converj was unveiled to the public at the Detroit Auto Show in 2009. For those feeling misty-eyed or nostalgic, though, check here for Autoblog's First Drive impressions of the extended-range plug-in. Related Video: Featured Gallery 2014 Cadillac ELR Review View 48 Photos News Source: Automotive News-sub.req. Green Cadillac GM Hybrid elr extended-range plug-in

Cadillac boss: Don't ask why we have so many sedans

Ugh, crossovers. Car-based, high-riding station wagons, for some reason, sell in absurd numbers and make automakers lots and lots of money. That's why automakers with a strong lineup of CUVs are running strong, while sedan-heavy brands are struggling. Cadillac is all too aware of this fact. While the company is preparing to launch the new CT6 luxury sedan, it's also realizing four sedans, a coupe, a crossover, and a $73,000, old-school, body-on-frame SUV does not a healthy lineup make. Worse, though, as Cadillac President Johan de Nysschen rued during the LA Auto Show, is that the new CT6 is joining a segment already oversaturated. While it's a big, expensive vehicle, it's not much bigger or more expensive than the CTS and XTS sedans. "Please don't ask me why we have three cars in the same segment," de Nysschen said, stopping midway through an interview with Automotive News on the CT6's market placement to make the crack. "That's a whole different subject." As for those CUVs, the new XT5 debuted in LA, and it will eventually be joined by another much-needed CUV in 2018, AN reports. Related Video: