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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 won't replace XTS after 2019

Cadillac wouldn't be Cadillac without a large sedan, but the definition of just which model fits that bill changed last week. Before the New York Auto Show, that role fell to the XTS. After the New York Auto Show, though, the focus shifted to the CT6. So what's to become of the XTS now that the CT6 has emerged? According to the latest intel, it'll live out the rest of its lifecycle until around 2019, but then drive off to its own funeral like so many limousines and hearses that were built off its platform. This was learned based on comments made by Cadillac chief Johan de Nysschen at the closed-door unveiling of the CT6 in Manhattan: "Ultimately, a car like XTS when it reaches the end of its lifecycle, will not be replaced." That'll be bad news for the livery business that – in the post-Town Car era – has come to rely on the XTS as the basis for its stretch jobs. "We will not have a car that will lend itself to these kind of modifications and we will probably withdraw from those markets," de Nysschen told GM Inside News. That's not all the new Cadillac boss had to say, though: he also indicated that the replacements for the ATS and CTS will be positioned differently from the current models: "As we move into the future refining our sedan portfolio, there will be no direct successor to the CTS. There will be no direct successor to the ATS. There is no point to renaming those cars because in the future those cars will disappear." Based on Johan's comments and those we've heard until now, we'd expect the replacement for the ATS to move down a size to take on the likes of the Audi A3 and Mercedes CLA, and the CTS' successor to move down half a size class as well to give the new CT6 a bit more breathing room, and possibly an even larger flagship sedan to be positioned above them all. Related Video:

Best 3rd Row SUVs of 2024

If you plan on using a vehicle's third row a lot, let us at least make the suggestion that a minivan would be a smarter bet than anything you're going to see on this list of best three-row SUVs. Their third rows are bigger, more comfortable and easier to get to. The kids will definitely be happier. Here are our two top choices.  OK, now that that's out of the way, we totally get why minivans are totally depressing and that if the kids want to be happier, they can buy their own darn vehicle. You're buying, you're driving, you're being seen in it and you'd rather have a three-row SUV. Fair enough. Luckily, there are more choices than ever and they're really good. The best do a particularly good job of being family friendly without looking like a drab transportation appliance, although really, you can't go wrong with any of the mainstream three-row SUVs. Now, some of the luxury choices are a bit suspect, including those that are otherwise very appealing but have cramped third-row seats (the Genesis GV80 comes to mind). We're focusing on three-row SUVs here, so having a usable third row is a must.   In this list, we have broken things down into four sub-categories: Best Three-Row Crossover |  Best Full-size Three-Row SUV Best Luxury Three-Row SUV |  Best Flagship Luxury Three-Row SUV Note that we define crossovers as SUVs since most buyers use the terms interchangeably, but acknowledge that "crossover" is literally a vehicle with a car-like unibody structure as opposed to the truck-like, body-on-frame construction that traditionally has defined "SUV." In other words, we consider all crossovers SUVs, but not all SUVs are crossovers (specifically those in the full-size segment and some in the flagship luxury segment). Best Three-Row Crossover SUVs of 2024 2024 Honda Pilot Why it stands out: Exceptional storage and cargo space; unique second-row functionality; refined ride; versatile and capable TrailSport; advanced AWDCould be better: Subpar acceleration with lackadaisical transmission and engine response; so-so driver assistance tech Read our full 2024 Honda Pilot Review The Honda Pilot was completely redesigned for 2023. It maintains its predecessor's family friendly packaging and overall focus, but it has injected a welcome sense of style (especially in the TrailSport pictured above) that makes it stand out much better from the big crossover crowd.