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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.

Is this the 2014-15 Cadillac Escalade?

Following the introduction of the redesigned Chevrolet Silverado and GMC Sierra, we're expecting General Motors won't wait too much longer to show off the next-generation fullsize SUVs that share this platform - including the Cadillac Escalade. It's still not clear if the next Escalade will debut for the 2014 or 2015 model years, but Carscoops has what it claims to an exclusive first look of the new Cadillac, revealing a portion of the headlight, front fascia and wheel.
Judging from this small picture, it looks like the Escalade could incorporate styling cues that we've seen on new Cadillac models like the ELR and the 2014 CTS, but that article says that other design details could include tall, vertical taillights similar to the CTS Wagon, staggered-width wheels and a narrower daylight opening for the side windows. The last time we saw the fourth-generation 'Slade back in October in spy shots, the heavy camouflage prevented us from getting an idea of the luxury SUV's appearance, but this image and description gives us something to look forward to. Head on over to Carscoops for more potential information as well as a full rendering from back in January.

2014 Cadillac XTS gets 410-hp twin-turbo V6

General Motors told us so back in March, but it is now official: The twin-turbocharged 3.6-liter V6 announced for the 2014 Cadillac CTS will also join the options list for the 2014 Cadillac XTS. The LF3 engine puts out 410 horsepower and 369 pound-feet of torque in the XTS, however, which is 10 hp and 61 lb-ft down from its application in the CTS. It will be identifiable from the outside by a specific grille treatment and a badge on the decklid. The 3.6-liter V6 with 304 hp and 264 lb-ft holds steady as the standard engine, and both will be yoked to a six-speed automatic transmission with paddle shifters.
Also new for the front-wheel drive model for 2014 are updates that include electric power steering and optional Automatic Parking Assist that can maneuver the sedan into parallel parking spots. The three trims above standard - Luxury, Premium and Platinum - get Intellibeam headlights that automatically switch between high- and low-beam,
The four current trim levels remain but the list of optional extras for the higher specs grows with a rear-seat entertainment system equipped with DVD screens in the front seatbacks, memory settings for the front passenger seat and an armrest in the back seat fitted with radio and sunshade controls. The press release below has more info on all of the changes.