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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.

J.D. Power study sees new car dependability problems increase for first time since 1998

For the first time since 1998, J.D. Power and Associates says its data shows that the average number of problems per 100 cars has increased. The finding is the result of the firm's much-touted annual Vehicle Dependability Study, which charts incidents of problems in new vehicle purchases over three years from 41,000 respondents.
Looking at first-owner cars from the 2011 model year, the study found an average of 133 problems per 100 cars (PP100, for short), up 6 percent from 126 PP100 in last year's study, which covered 2010 model-year vehicles. Disturbingly, the bulk of the increase is being attributed to engine and transmission problems, with a 6 PP100 boost.
Interestingly, JDP notes that "the decline in quality is particularly acute for vehicles with four-cylinder engines, where problem levels increase by nearly 10 PP100." Its findings also noticed that large diesel engines also tended to be more problematic than most five- and six-cylinder engines.

Cadillac says it made CUE infotainment a lot better

We've never been huge fans of CUE, the Cadillac User Experience infotainment interface. It's been around a few years now, and the best thing we can say for it is that it now supports Android Auto and Apple CarPlay, making it easy enough to replace most of the interface with a familiar smartphone-based system. Now Cadillac has made some big upgrades to the system that should address at least some of our concerns. First and foremost, the system is claimed to be more intuitive, with a more logical interface design. Cadillac has added a Summary View that gives an overview of the climate, media, navigation, and phone all at the same time. The system will also be able to receive over-the-air updates, allowing Cadillac to make improvements more often and push them out to owners' cars, mush like Tesla and other automakers already do. The 4G LTE connection will also be used to connect the car with the cloud, where drivers can store and modify their own personalized set of settings. This My Driver Preferences profile will include things like contacts, navigation preferences, and recent destinations, and will also follow them from one car equipped with the system to another. That should come in handy for anyone subscribing to the $1,500-a-month Book by Cadillac vehicle subscription service, which allows participants to swap between cars when they choose. The cloud connection will also carry over to a new available navigation function, which Cadillac claims has a more intuitive, smartphone-like interface. It uses its data connection to provide current destination info and is supposed to learn a driver's habits, such as their preferred routes and frequent destinations, which the system will then attempt to offer up predictively – so the car should be able to know that you're heading home at 5:00. Additional apps for the system will be available through Cadillac's new Collection app store. And it's still compatible with Android Auto and Apple CarPlay. One sore spot that appears to have been improved is the digital gauge package, although Cadillac hasn't offered details on that extension of the system. The current iteration's ability to over-customize the interface (our personal favorite is the option to display a total of four speedometers between the head-up display and the gauge screen; see video below) and unintuitive controls make it difficult to use and learn, while the simulated gauges don't look particularly realistic.