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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.

Jay Leno welcomes a 2016 Cadillac CTS-V into the garage

After checking out a multitude of classic cars and customs over the past few weeks, Jay Leno switches things up with a modern performance machine in the latest video from the garage – a 2016 Cadillac CTS-V. Leno is curious about Caddy's attempt to challenge the BMW M5 and Mercedes-Benz E63 AMG S, and he takes a long, technical look at the sedan with chief engineer David Leone. Not content to just peek under the hood, Leno puts the CTS-V up on the rack to see what it packs underneath the svelte body. Once he gets the lowdown on the Caddy's engineering, it's time for a drive. Leno also flexes his interviewing skills while behind the wheel and gets even more info about the CTS-V's capabilities from Leone. He seems fairly impressed, but Leno's most entertaining question about the 640-horsepower sedan is whether it can do a burnout. He provides a definitive answer to that at the end of the clip. Related Video:

Cadillac recalls 120k examples of ATS for fire risk

Cadillac is recalling a total of 119,339 units (96,145 in the US alone) of the 2013-2016 ATS sedan, because the coil antenna module that powers the rear defogger can overheat. The problem has been linked to four fires, but there have been no injuries, fatalities, or crashes, according to the automaker. During manufacturing, the antenna might have been produced with "critically weak terminal connectivity." If being cycled on and off often or used continuously, these faulty examples can overheat, leading to a fire in the driver's side rear pillar. According to the company, "less than 1 percent of the recalled vehicles are expected to have the condition." According to the National Highway Traffic Safety Administration (in a PDF), the fix is a reflash for the ATS' Electronic Climate Control module that automatically turns on the rear defogger when the engine starts. In addition, 2013 models keep the system on continuously at low temperatures at highway speeds and this is also being disabled in the update. The changes are meant to cycle the coil less often, but owners can still turn it on manually. Related Video: GM Statement: General Motors is recalling approximately 96,145 2013-16 model year ATS sedans in the U.S. Some of these vehicles may have been manufactured with critically weak terminal connectivity in the coil antenna module, which powers the rear defogger system. If the module has the condition and is subjected to excessive cycling or continuous operation, it may overheat and a fire may develop inside the rear pillar on the driver's side of the vehicle. Less than 1 percent of the recalled vehicles are expected to have the condition. GM is aware of four fires but no injuries, fatalities or crashes. Including Canada, Mexico and exports, the total population of the recall is approximately 119,339. RECALL Subject : Rear Defogger Coil Antenna Module may Overheat Report Receipt Date: SEP 03, 2015 NHTSA Campaign Number: 15V558000 Component(s): VISIBILITY Potential Number of Units Affected: 96,145 All Products Associated with this Recall Vehicle Make Model Model Year(s) CADILLAC ATS 2013-2016 Details Manufacturer: General Motors LLC SUMMARY: General Motors LLC (GM) is recalling certain model year 2013-2016 Cadillac ATS sedan vehicles manufactured April 23, 2012, to September 2, 2015. In the affected vehicles, the coil antenna module that powers the rear defogger system may generate excessive heat due to excessive cycling or continuous operation.