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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 prices the 2020 XT6 crossover from $53,690

Cadillac has announced official pricing for its new XT6 crossover, built in Tennessee. The three-row XT6, Cadillac's first big crossover, starts from $53,690 when it goes on sale later this spring. For that, Cadillac offers the "Premium Luxury" trim level model with front-wheel drive; AWD is optional. Above the Premium Luxury is the XT6 Sport, which comes standard with AWD and starts from $58,090. Both prices include destination charges. The sole engine at this point is the 3.6-liter naturally aspirated V6, which produces 310 horsepower and 271 lb-ft of torque; the transmission is a nine-speed automatic. The Premium Luxury and Sport differ visually, with the former offering more chrome and wood, while the latter has blacked-out trim in place of chrome and carbon trim instead of cabin wood. The wheel design is different between the trim levels, and the Premium Luxury has red taillights while the Sport version has clear tails. The Sport model has continuously adjustable shock absorbers. Both models have seven airbags as standard, as well as an HD rear camera, forward collision alert, automatic emergency braking and front pedestrian braking, front and rear park assist, lane change and blind spot alert, lane keeping assist and lane departure warning and rear cross traffic alert. The lighting is LED front and rear; inside, a heated steering wheel is standard, as is a power folding third-row seat and a remotely folding second-row seat. Seven-passenger seating is standard, and a six-passenger setup is optional with captain's chairs for the second row. There are option packages such as the Enhanced Visibility and Technology Package, which adds an eight-inch gauge cluster display and an HUD, both in color, HD surround vision with recording, and automatic parking assist with braking. The Driver Assist package adds adaptive cruise and enhanced AEB, and one can also specify night vision. The XT6 charges phones wirelessly and is Apple CarPlay and Android Auto compatible as standard. It also has a 4G LTE Wi-Fi hotspot with 3GB or three months' worth of data thrown in, and phones are paired via NFC. Cadillac is taking orders for the XT6 starting in March.

Cadillac ATS was almost front-wheel drive

"We were going to do a front-wheel drive Cadillac compact off of Delta because it was going to be less expensive," Doug Parks, General Motors' vice president of global product programs, told the Automotive News during the Detroit Auto Show in January of this year. That sentence, referring to early ATS discussions more than five years ago - a period when the automaker, and the industry, was struggling - reveals that Cadillac's highly acclaimed rear-wheel drive compact sedan almost never happened.
Parks revealed that that automaker actually built a 2.0-liter test mule, on GM's Delta platform (shared with the Chevrolet Cruze and Buick Verano) and tested it in Europe. While the prototype was "pretty darn good," according to Parks, the team realized that in order to compete against Mercedes-Benz and BMW it would have to invest in a new rear-wheel drive platform.
The resulting all-new Alpha platform would eventually underpin the Cadillac ATS, and many would argue that its balanced rear-wheel drive chassis is its single most important attribute. Thankfully, the Alpha's goodness won't stop with the ATS. The upcoming 2014 Cadillac CTS and the future Camaro will also share its architecture, meaning the Cimarron will remain a distant memory.