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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.

2014 Cadillac ELR whirs into Jay Leno's Garage

While Jerry Seinfeld was gallivanting around LA with Sarah Silverman in a Jaguar XKE, our favorite car-loving comedian, Jay Leno, was checking out the all-new 2014 Cadillac ELR. Set to go on sale later this year, Cadillac brought its ELR to Jay Leno's Garage to show off some of its styling and technology as well as give Leno some seat time in the range-extended EV. Leno owns both a Volt and a CTS-V, and the ELR is a kind combination of the two (sort of).
In this episode, Leno spends some time talking to Frank Saucedo, GM director of advanced design, and ELR chief engineer Chris Thomason before logging a few miles on the sleek coupe. Interestingly, it seems that GM has definitely changed its tune a little since the introduction of the Volt a couple years ago; Saucedo and Leno both refer to the ELR as a hybrid, and Thomason says that it gets the "bulk of its propulsion" from the electric motors. Whatever you want to call it, scroll down to watch the latest episode of JLG with some great information and driving shots of the plug-in Cadillac.

Facelifted Cadillac ATS spied completely uncovered

The Cadillac ATS makes for a pretty svelte little coupe, and General Motors appears to know it, because multiple, completely undisguised prototype sedans have been spotted testing wearing what look like many of the forthcoming coupe's body parts.
Not only does it wear at least the outline of the brand's new, broader crest, it has the same front air dam with continuous chrome strip found on the coupe. The only real difference is that it has the somewhat taller side view mirrors from the sedan, rather than the narrower, longer ones from the coupe. Around back, the changes are harder to spot because the test car is outfitted with an unpainted lower bumper. However, it seems to lack the chrome strip that offsets the lower portion of the coupe from the sedan.
The ATS sedan is already a looker, but it is good to see Cadillac is taking a second pass using what it learned on the coupe. There's no word yet on when this revised sedan is going to hit the streets - let alone what changes will take place beneath the skin - but we're thinking it looks about right for 2015.