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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 bids farewell to CTS-V Coupe with special edition

With the introduction of the latest Cadillac CTS, we knew it would only be a matter of time before a new CTS-V would come along. Now General Motors has revealed that the next CTS-V will arrive sometime next year, but before it does, the company is sending off the outgoing coupe with a special edition.
For 2015, the Cadillac CTS-V Coupe will come in a limited edition of 500 units decked out with a dark grille treatment, satin-finish wheels, red brake calipers and an upgraded cabin. The interior is decked out Recaro seats trimmed in black with red stitching, Midnight Sapele wood trim, metal pedals and a microsuede-trimmed steering wheel and shifter.
Buyers will be able to opt for white, gray or optional black exterior paint, an available sunroof and a six-speed transmission in either manual or automatic configuration. Of course, the 6.2-liter supercharged V8 comes standard with 556 horsepower, as does Magnetic Ride Control and brakes by Brembo. Pricing will be announced closer to launch, but in the mean time, you can read all there is to know by checking out the official release below.

Saturn Vue ignition switch leads to new group of GM recalls totaling 312k

General Motors has another spate of recalls to announce. This time they cover 312,280 vehicles worldwide, including 269,041 of in the US, in a total of six campaigns. In 2014, the automaker has recalled 29,079,765 vehicles worldwide, with 25,754,356 of those in the US.
The largest among them covers 215,243 units of the Saturn Vue from 2002-2004 model years worldwide, 202,115 in the US. It's possible for the for the key to be removed even when the ignition isn't in the OFF position. The company knows of two crashes and one injury caused by this problem. Dealers are checking the parts and replacing the ignition cylinder and key set, if necessary.
Next is 72,826 models worldwide (48,059 vehicles in the US) of the 2013 Cadillac ATS four-door sedan, 2013 Buick Encore and 2013 Chevy Trax in Canada. It's possible that the for lap belt pretensioner to retract but not to lock, which could increase occupant movement during a crash. Both front, outboard lap belt pretensioners are being replaced, and a stop-sale is in effect on unsold models until the problem is repaired. There are no known crashes or injuries, though.