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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.

2018 Cadillac XTS does its best CT6 impression

Although the Cadillac sedan lineup almost exclusively consists of rear-drive sedans, one last bastion of the old front-drive Caddy exists in the XTS. And it looks like the old-school XTS isn't going anywhere, since it just got a refresh that makes it look more like the CT6 and the CTS. This of course is a bit ironic considering the fact that the CT6 will look different in the near future. Until then, though, this update does make the XTS look more up-to-date. The main part of the headlights end higher up on the front fascia, while a strip of LED accent lights waterfall down the front bumper. The grille has slightly more sculpted slats, and the front badge has been scaled down a bit. There are no longer creases that unify the main grille and the lower one in the bumper, which help the car appear lower and wider than the outgoing model. At the back, the license plate position has been moved down to the bumper, and the trunk lid has more lines and creases. The taillights now have horizontal elements that extend toward the middle of the car. The exhaust finishers and the reverse light also look larger and more prominent now. The refreshed XTS also brings a couple of new trim options. There are new wheel designs both in 19- and 20-inch sizes. Inside, XTS buyers will be able to choose from three new color and upholstery combinations. Two of them, however, are exclusive to the Platinum trim level and come with semi-aniline leather seats. There's not really anything new mechanically with the 2018 XTS. The only major change seems to be a new tire design that is quieter and provides a smoother ride. Otherwise, the XTS will remain available with either the standard 3.6-liter V6 making 304 horsepower, or the optional 410-horsepower twin-turbocharged 3.6-liter V6 in the V-Sport model. The standard engine comes with either front-wheel drive or all-wheel drive, and the V-Sport is only available with all-wheel drive. Pricing has yet to be released for the 2018 model year. Related Video: Featured Gallery 2018 Cadillac XTS Image Credit: Cadillac Cadillac Luxury Sedan cadillac xts

Cadillac rushing update for laggy CUE infotainment system

BMW's innovative iDrive was introduced in 2001, and a dozen years later, automakers are still learning hard lessons about what consumers want in their infotainment systems. In response to owner feedback - and a few media drubbings - about the delayed and occasionally fickle responses of its CUE (short for Cadillac User Experience) system, Cadillac has told Wired that it's going to issue an update this year.
Coming for the XTS and ATS, the new software will mean quicker haptic feedback to driver inputs on the touchscreen and the buttons, and snappier responses on screen. Down the road, Cadillac's VP of marketing says that a different mix of screen controls and hard buttons is "something you'll be seeing in the future" - the system is presently a mix of touchscreen-based controls and capacitive-touch switchgear - there are no knobs or physical pushbuttons to speak of, and the omission of both has proven to be a divisive issue among consumers and industry pundits.
Cadillac hasn't provided a date for when the CUE update will be issued, but it has indicated that the service will be performed by dealers, not sent wirelessly.