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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.

GM recalling another 2.7 million vehicles in five separate campaigns

The recalls keep rolling in from General Motors, evidently keen to avoid repeating the mistakes of the ignition-switch debacle and clean house. This time they're all coming at once, with five separate recalls announced together covering approximately 2.7 million vehicles.
The largest of the five actions involves over 2.4 million units of the previous-generation Chevrolet Malibu and Malibu Maxx, Pontiac G6 and Saturn Aura in order to fix brake light wiring harness, which have been found to be susceptible to corrosion. The recall is separate from the 56k Aura sedans which GM recently recalled over faulty shift cables, not to mention the previous massive recall of 1.3 million vehicles - some of them the same models - but appears to have resulted from the National Highway Traffic Safety Administration investigation that started with the G6 almost a year ago.
The second-largest campaign involves the 2014 Chevy Malibu, specifically those fitted with GM's 2.5-liter engine and stop/start system, approximately 140,000 examples of which has been found to have problematic brakes. The issue does not appear to be connected to the recall of 8k Malibu and Buick LaCrosse sedans (also involving brake woes) which we reported upon last week. Four crashes have been reported in such models, but GM admits it's not yet clear if the problem was a contributing factor in the accidents.

Recharge Wrap-up: Lyft partners with Didi Kuaidi, Cadillac uses ultracapacitors

Lyft and Chinese on-demand transportation venture Didi Kuaidi have announced a partnership. Additionally, Didi Kuaidi is investing $100 million in Lyft. The two ridesharing companies will share technology and provide interoperability between platforms. For users, this means it will be easier to get around when traveling between the US and China. "In today's rideshare environment, where every region presents a unique set of challenges and opportunities, partnering with the homegrown leader is the winning approach to Chinese expansion," says Lyft President and co-founder John Zimmer. Learn more in the video above, and in the press release below. Car2go has announced service in Miami Beach, FL. Beginning October 1, the one-way carsharing service will expand its boundaries beyond its current Miami service area to include neighboring Miami Beach. "We're thrilled to see car2go expand to Miami Beach," says Miami Beach Mayor Philip Levine. "Miami Beach residents and visitors are increasingly seeking new, environmentally conscious options to move around North, Middle, and South Beach, and carsharing is an important part of realizing that vision." Read more from Car2go. ClipperCreek has added the HCS-30 EVSE to its product line. The 24-amp, 240-volt Level 2 charging station is designed for residential and workplace duty. It allows for faster charging without the customer having to upgrade their electrical service panel. Delivering about 20 miles of range per hour of charging, the HCS-30 EVSE can charge most EVs in about four hours. Pricing begins at $565. Read more from ClipperCreek. Cadillac will use ultracapacitors in its stop-start systems for 2016. Rather than relying on battery power to run electrical systems while the engine is not running, the utracapacitors can provide a stable flow of energy without losing lifespan to repeated cycling. Supplied by Maxwell Technologies, the ultracapacitors are also lighter than batteries and, according to Cadillac, provide smoother restarts. The 2016 models to use the updated stop-start technology as standard will be the ATS and CTS, with the exception of the V performance variants. Read more at Green Car Reports. Lyft and Didi Kuaidi Announce Strategic Partnership, Building Toward a Collaborative Global Ridesharing Alliance - Didi Kuaidi Invests $100 million in Lyft - Companies Introduce Ridesharing Coverage Between the U.S.