1976 Cadillac Edorado Convertable (no Reserve) on 2040-cars

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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.

How the demise of Lincoln's Town Car has kick-started a limo revolution

The deaths of the Ford Crown Victoria and the Lincoln Town Car have meant overhauls of three high-profile American fleets: police, taxi and livery car. Just as police fleets are more open to considering other options and a Nissan van is the new face of the NYC taxi, livery car companies are looking at replacements for the Town Car beyond The Blue Oval. Ford, via Lincoln, has made an MKT Town Car (pictured), but an article in the Detroit News claims "it has failed to win over most of the big limousine companies." The upstarts trying to move in include livery and limo editions of the Cadillac XTS, and livery specifications of the Toyota Avalon and Chrysler 300.
Each of those challengers, however, faces challenges. The Town Car was a workhorse, American, rear-wheel-drive sedan with plenty of rear legroom. Cadillac has been in the livery space before but with decontented models that were about selling the brand, not its luxury. It is taking the opposite approach with the XTS, pointing out that its livery edition is "contented in the upper half of the XTS range." Still, the CEO of Michigan's largest livery company says "it's quite a bit smaller than what we're used to," and he also prefers rear-wheel drive.
The Chrysler 300 is rear-wheel drive, and American, which matters to some companies, but Chrysler hasn't yet revealed the livery package for it. The livery Avalon marks Toyota's first time getting into that business in the US, a natural step after having done so well with taxi clients and with the Town Car out of the way. Still, the livery client is a different to taxi buyers, so the Avalon could face other soft-touch hurdles.

SRX-replacing Cadillac XT5 spied for the very first time

Cadillac has got big plans in place to revitalize its lineup, with new sedans, coupes and crossovers. And it all starts with this, the replacement for the SRX.
Expected to be called XT5 in line with the brand's new naming scheme, the crossover will be based on a scalable new platform called C1XX - or Chi, for short. In its shorter form, Chi is anticipated to underpin the XT5 as well as a new Chevy crossover and the next-gen GMC Acadia. In long-wheelbase form, the platform is slated to give us a larger Cadillac crossover as well as a new Buick Enclave and Chevy Traverse.
Power in the XT5 will be provided by a choice of turbo four or atmospheric six, potentially to be transmitted through GM's new nine-speed automatic.