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Cadillac XT3 caught covered in copious camouflage

While a bit difficult to tell thanks to the impressive camouflage used, what we're looking at here is likely the upcoming Cadillac XT3. There are a few details that stand out to lend credence to this prediction. There are a handful of sharp angles scattered throughout that are in line with Cadillac's modern design language. Specifically in the LED running lights and on the side mirrors. The rear profile also is reminiscent of the current, and slightly larger XT5. The rear lights extend into the D-pillars, which would match the current Escalade. We get a pretty clear picture of the rear suspension on this XT3. It's clearly an independent rear suspension using coil springs. While General Motors uses independent suspension on some of its crossovers, we can't quite match it to a particular model. We believe that if the XT3 is based on an existing model (which it almost certainly is), the platform and suspension have been substantially modified. The XT3 could use a version of the D2XX platform that underpins the Buick Envision. However, we know from a previous report that the XT3 will likely be built at the factory that produces the Buick LaCrosse and Chevy Malibu. The XT5 uses a modified version of the LaCrosse/Malibu platform, so it's possible the XT3 could use a shorter version of the XT5 chassis. Depending on how small the XT3 ends up being, it might even share a platform with the Chevy Trax and Buick Encore. However, considering their economy car roots and torsion-bar rear suspension, we think that's the least likely. Regardless of what chassis is underneath its crisp bodywork, we expect the XT3 to be released sometime next year. Related Video:

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:

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.