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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.

2020 Cadillac CT5 finally appears, hopes you think it's a Charger

This is our first look at what we expect to be the 2 020 Cadillac CT5 sport sedan, a one-to-rule-them-all replacement for the ATS, CTS and XTS. The name follows the scheme set by the CT6 and XT5. The first thing that jumps out about the CT5 is the big hood scoop. We sincerely doubt that scoop will make it to production, and when combined with the scalloped shapes on the car's flanks, we and the spy photographer feel they're probably there to dupe people into thinking it's a weird Dodge Charger. The disguise isn't working, but the scoop surprisingly looks pretty good. Maybe Cadillac should consider putting one on an inevitable V model. Moving past the fake bodywork, we can see that this CT5 takes inspiration from the Cadillac Escala concept. It has the long, almost fastback cabin and extra rear quarter window of that concept. The headlights are slim horizontal units, too, though they still sweep back a bit to bridge the gap between current models and the Escala. We also see that there's a decent amount of distance between the front axle and the base of the A-pillar, so we suspect that the sedan will retain rear-drive and optional all-wheel-drive drivetrains. We don't have any other cars in the image to compare it to, but considering the cars the Cadillac CT5 will replace, we expect it's roughly the size of a CTS, maybe even a touch smaller to satisfy those who want a 3 Series/A4/C-Class size luxury sedan. It will also probably use one or more of the existing powertrains in the Cadillac sedan fleet, which include a turbo 2.0-liter four-cylinder, naturally aspirated 3.6-liter V6, and a twin-turbocharged 3.0-liter V6. We'll also probably see the production model sometime in 2019 since that's when the CTS and ATS will go to the big garage in the sky. Related Video: Featured Gallery Cadillac CT5 spy shots Image Credit: Chris Doane Automotive Spy Photos Cadillac GM Luxury Sedan cadillac ct5

First Cadillac ELR rolls off the line

Gearing up for the Belle Isle Grand Prix this weekend, General Motors invited some of the Chevrolet and Cadillac racecar drivers out to its Detroit-Hamtramck assembly plant. While there, the racers - including IndyCar Driver and Chevrolet Volt owner, Simona De Silvestro - witnessed the very first 2014 Cadillac ELR to roll off the assembly line.
These vehicles are not destined for customers, however, but instead pre-production units will be used by engineers for testing purposes. Actual production of ELR consumer models is expected to commence closer to the end of this year. As a refresher, this range-extended electric Cadillac shares much of its powertrain with the Volt but will have a sportier coupe design inspired by the Converj Concept. De Silvestro manged to snap a few images of here own, which you can see in the gallery below.