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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 confirms CT8/CT9 flagship, ELR successor

Cadillac has certainly been a hot topic as of late, what with Johan de Nysschen now running the joint, moving its headquarters to New York, and overhauling the company's naming structure (only to later publicly defend all of these drastic decisions). Now, looking ahead, de Nysschen is already revealing some details about what's in store for the future, including a raft of new products that include a large, long-wheelbase Mercedes-Benz S-Class rival positioned above the recently announced CT6, along with a successor to the slow-selling ELR coupe.
In an interview with Reuters, de Nysschen says his company has "just signed off on" a new flagship tipped to be called CT8 or CT9. It will compete with the long-wheelbase versions of the Mercedes-Benz S-Class and BMW 7 Series, and should come to market by the end of this decade.
Among other news, the South African executive said a followup to the ELR plug-in hybrid is in development, though it may not be a two-door coupe like the current car. That's not necessarily a bad thing, since the ELR has garnered nothing but slow sales and poor reviews since its launch.

SRX-replacing Cadillac XT5 spied for the very first time

Cadillac has got big plans in place to revitalize its lineup, with new sedans, coupes and crossovers. And it all starts with this, the replacement for the SRX.
Expected to be called XT5 in line with the brand's new naming scheme, the crossover will be based on a scalable new platform called C1XX - or Chi, for short. In its shorter form, Chi is anticipated to underpin the XT5 as well as a new Chevy crossover and the next-gen GMC Acadia. In long-wheelbase form, the platform is slated to give us a larger Cadillac crossover as well as a new Buick Enclave and Chevy Traverse.
Power in the XT5 will be provided by a choice of turbo four or atmospheric six, potentially to be transmitted through GM's new nine-speed automatic.