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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.

GM recalling 2013 Buick LaCrosse, Cadillac SRX over transmission software

The National Highway Traffic Safety Administration has issued recalls for the 2013 Buick LaCrosse and 2013 Cadillac SRX due to a problem with the software for the transmission controller. On about 27,000 SRX and LaCrosse models, the transmission could accidentally be shifted to Sport mode, which would reduce the amount of engine braking drivers experience.
NHTSA says this could increase the risk of a crash, but, fortunately, the required fix is simply an update to the software.
While we're on the subject of General Motors vehicle recalls, a small number (48) of compressed natural gas versions of the 2011 Chevrolet Express are also being recalled for a potential risk of fire or explosion. Yikes. Both official recall notices are posted below.

Cadillac mulling CTS Coupe successor after all

The 2014 Cadillac CTS made a big splash last week at the New York Auto Show, but now that we've seen the sedan, we can start to wonder about whether coupe and wagon versions are in the cards. According to Edmunds, Cadillac is at least considering bringing back the CTS Coupe for a second generation, which seems like an even better chance since the brand's global marketing director, Jim Vurpillat, was quoted as saying that the car was the top-selling luxury coupe in the industry.
Of course, this goes against reports we heard last year that Caddy's coupe and wagon would live on just not under the CTS name, but the interview with Vurpillat has us hopeful for a next-generation CTS Coupe. If it does come to fruition, we would expect the new two-door to have a largely unique exterior design like the current CTS Coupe, to echo that of intended rivals like the Mercedes-Benz E-Class Coupe and even the high-dollar BMW 6 Series.