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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 considering new powertrain options for large SUVs

Aside from the new General Motors offerings, there's not a whole lot of action going on in the fullsize SUV segment. That doesn't seem to be stopping GM from pushing the envelope in the market as Automotive News is reporting that the automaker is looking to introduce some new powertrain options into the Chevy Tahoe (and Suburban), GMC Yukon (and Yukon XL) and the Cadillac Escalade - all have been redesigned for the 2015 model year.
Now, we already know that GM and Ford are collaborating on nine- and ten-speed transmissions for a broad range of applications (including the big SUVs), but this new report says that GM is also considering other options as a way to one-up the competition and, of course, to optimize fuel economy. AN quotes Jeff Luke, executive chief engineer for GM trucks, as saying that "interesting powertrain technologies" are coming including a return of a hybrid SUV and possibly even a diesel engine. Although it sounds like the latter could come down to how customers respond to the 2014 Jeep Grand Cherokee EcoDiesel.

Chip Foose is bringing life to a Cadillac sketch from 1935

General Motors, automotive home of Harley Earl, was a pioneer in the early days of car design. But for as many wild concept cars and even production cars as the company's studio created, there were still many that never got off the paper. Chip Foose is working to change the fate of one of those designs. According to Foose Design, Chip Foose's latest project is based on a sketch from 1935. Car dealer Wes Rydell and his wife Vivian commissioned a custom Cadillac coupe that was sketched out by GM designer Art Ross. It would take an existing Cadillac sedan, shorten it, lower it and give it a removable hardtop. The drawing is as far as the project got. Now Chip Foose is working on realizing the design in real life using a 1939 Cadillac Series 60 Sedan. He plans to follow the initial design brief, but with his own unique touches. He has also named the project "Madam X" in honor of what Harley Earl would call client projects. It is scheduled to be finished and ready for unveiling at the end of the summer. Foose is a well-known designer who has won some of America's most prestigious custom car awards such as the Ridler Award and designed vehicles for the TV show Overhaulin'. The final product should be quite a striking machine. You can see how it's coming along, as well as Foose's sketch of what the car will finally look like, in the gallery above. Related Video: Featured Gallery 1939 Cadillac Series 60 by Chip Foose View 13 Photos Image Credit: Foose Design, Inc. Auto News Celebrities Design/Style Cadillac Classics chip foose overhaulin