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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.

2015 Cadillac ATS Coupe priced from $37,995*

Cadillac has released pricing details on its new-for-2014 ATS Coupe. The new model, which will be available with buyer's choice of a 2.0-liter, turbocharged four-cylinder or a 3.6-liter V6 (the ATS Sedan's base 2.5 won't be making the trip) can be had with optional all-wheel-drive in place of the standard rear-wheel setup, while customers can also snag a six-speed manual or six-speed auto.
Prices start at $37,995, which represents a $2,900 premium over the 2014 ATS Sedan (pricing on the 2015 four-door isn't available yet) with the same 2.0-liter engine. Still, the ATS Coupe starts at just over $2,500 less than a base BMW 428i, which is also less powerful and offers less standard equipment. The Caddy is also less costly than the Mercedes-Benz C250 Coupe, although only by about $200. It's even cheaper than the Audi A5, which starts at $38,105, but that model includes all-wheel drive as standard. It should be noted that these prices are without their respective destination charges (*$995 for the Caddy, $925 each for the BMW and the Mercedes and $895 for the Audi).
Unfortunately, Cadillac hasn't released any additional pricing information beyond what we have here, so we can't tell you how much things like all-wheel drive, an automatic transmission or the 321-horsepower V6 will cost. That makes it difficult to figure out just how reasonable the ATS Coupe will be relative to its challengers, but so far, the value equation looks to be in the car's favor. When those full details roll in, though, you know where to look. Scroll down for the official press release from Cadillac.

GM Super Cruise beats Tesla Autopilot again in latest hands-free test

DETROIT — General Motors' Super Cruise once again edged Tesla's Autopilot in an evaluation of 17 vehicles equipped with active driving assistance systems (ADAS) by Consumer Reports, the testing organization said on Wednesday. A Tesla Model Y fitted with Autopilot finished "a distant second," the group said, to a Cadillac CT6 equipped with Super Cruise, which GM is rolling out to more than 20 vehicles — including its new Hummer electric pickup truck — over the next three years. Safety and insurance researchers have frequently warned of the risks of consumers overestimating ADAS systems' abilities, a misconception increased by some automakers calling their products Autopilot, ProPilot or Co-Pilot. In 2018, the Cadillac CT6 with Super Cruise scored higher than a Tesla Model 3 with Autopilot, in a Consumer Reports test of just four vehicles equipped with ADAS. In the latest test, conducted this summer on a track and on public roads, the Cadillac scored 69 points out of a possible 100, while the Tesla scored 57. A Lincoln Corsair equipped with Ford's Co-Pilot 360 system, finished third with 52. The critical difference in the Super Cruise system is a driver-facing infrared camera to make sure he or she is paying attention to the road and is ready to take over manual control when necessary, said Kelly Funkhouser, head of connected and automated vehicle testing at Consumer Reports. The group noted that Autopilot can shut off abruptly in some situations, while Super Cruise did a better job of notifying the driver when the system is disengaging. In recent European safety testing, a Tesla Model 3 with Autopilot placed sixth out of 10 systems, getting high marks for performance and ability to respond to emergencies, but falling short on its ability to maintain a driverÂ’s focus on the road. Related Video: Green Cadillac GM Hummer Tesla Safety Technology Autonomous Vehicles Electric Super Cruise