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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.

Cool car technology is cool until it breaks

Ah, technology – the beautiful date that impresses all your friends but costs you a fortune to keep happy, up-to-date, and working. Automotive News puts some numbers to the economic toll we're paying to jockey this technological Trojan horse, an analysis it sums up with "Technology is great - until you have to replace it." Back in 2000, for instance, you could replace a Cadillac Escalade taillight lens for $56.08, or replace the entire unit for $220.49. Crack the rear lens on your 2015 Escalade and you have to buy a new unit for $795 - there's no such thing as just replacing a lens anymore. What about headlights? It was $210 for an Escalade headlight in 2000, it's $1,650 for the current unit (pictured). This is nothing we didn't know, these are just hard numbers to demonstrate it. Edmunds recently provided the same with its sledgehammer-bashing of the 2015 Ford F-150, Tesla Model S buyers have been shrieking about repair costs to their electric sedan's all-aluminum bodywork, and used-car sites are full of articles about which expensive-to-repair features to steer clear of if you want to avoid big repair bills. Those expensive bits increase the price of a car - Kelley Blue Book says the average price of a car is now more than $33,000 - and that raises rates for repairs and insurance. This comes in spite of some carmakers that have been collaborating with insurance companies and repair shops at the design stage in order to engineer parts that are easier and less expensive to replace. But the tech can have its cost-saving benefits: a 2011 study by the Highway Loss Data Institute found that Volvos fitted with that company's City Safety feature "filed 27 percent fewer property-damage liability claims" than luxury SUVs without it, and just last month the Insurance Institute for Highway Safety called adaptive headlights one of the top four crash-preventing technologies on cars today (after coming out against them in 2006). So yes, the technology costs a mint when it needs to be fixed - but being able to avoid an accident in the first place might make it worth it. News Source: Automotive News - sub. req.Image Credit: Copyright 2015 AOL Cadillac Car Buying Used Car Buying Auto Repair Insurance Maintenance Safety Technology Luxury replacement parts

Cadillac CT6 gets a plug in Shanghai, will come to US

Don't call it the third coming of the Chevy Volt. The unsurprising debut of the Cadillac CT6 PHEV in Shanghai today has a powertrain that sounds an awful lot like the one that can be found in the Volt and the Cadillac ELR. The plug-in CT6 – identical to the CT6 that debuted in New York earlier this month – has an 18.4-kWh lithium-ion battery (just like the 2016 Volt) and offers an all-electric range of around 37 miles. It also copies the "Regen on Demand" feature from the new Volt and the battery cells "use the latest generation cell chemistry found in other GM plug-in vehicles." But Cadillac President Johan de Nysschen doesn't see the two powertrains as similar in at least one important way. General Motors calls the Volt and the ELR "extended range electric vehicles" (EREV) but in a statement, de Nysschen says that the plug-in hybrid CT6 is, "an ideal platform for Cadillac to offer its first plug-in hybrid." That GM is using the PHEV terminology rather than EREV is going to be important to some, even if the practical difference is only semantic. And yes, we all understand the irony of de Nysschen – the same guy who has a history of speaking ill of plug-in cars – hyping them now. Back when he worked for Audi, he said the original Volt was too expensive for what it offered and was thus, a car for "idiots." Speaking in Shanghai today, de Nysschen said the new CT6 PHEV was, "an EV without any of the disadvantages or range constraints," according to Automotive News. If the batteries are similar to GM's other EREV/PHEV cars, the CT6 powertrain is at least different. The ELR uses a 1.4-liter engine, while the new Volt has a 1.5-liter four-cylinder mill. The CT6, on the other hand, has a 2.0-liter turbo four-cylinder engine with direct injection. There is also an "all-new rear wheel electric variable transmission (EVT) with exclusively designed motors," that will give the CT6 PHEV, "smooth, spirited acceleration." The EVT is a two-motor-unit that uses three planetary gears. Maximum overall system output is 335 horsepower and 432 pound-feet of torque. Perhaps most interesting for American audiences is the fact that GM's press release, available below, makes multiple references to US-market sales of the PHEV. Official details on the EV range and fuel economy will be made available closer to the car's US launch.