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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.

Cadillac dealers frustrated over Escalade production snarls

Lincoln went through it during the launch of the MKZ last year, Jeep went through something similar with its Cherokee launch, and now the 2015 Cadillac Escalade has apparently caught the bug: dealer delivery delays because of quality control checks. Automotive News reports that Cadillac dealers have been waiting three times longer than usual - a month or more - from the time an Escalade leaves the assembly line to when it gets delivered. Worse, dealers are saying they don't always know where their vehicles are in transit, or when they are set to arrive. The situation has upset customers who have put down deposits and things have gotten so bad that some dealers have reportedly stopped taking pre-orders.
Cadillac says it has the delay, called "dwell time," down to two weeks, and it expects to cut that to a week by the beginning of September. The company said "a lengthy quality-assurance process on some interior parts" has caused the lag, the report citing additional issues with figuring out which vehicles should be delivered first. A spokesman said that more trucks have been put in the distribution system to work through the backlog, but it's clear it's still going to take some time to set things right, with one dealer telling AN that cars ordered in February and March still haven't arrived.
Brand chief Kurt McNeil said additional personnel are at the Escalade's Arlington, Texas factory to speed up the checks, and spreadsheets tracking every order have been distributed to field staff. Even with the snafu, though, the Escalade is Cadillac's best seller through July.

Cadillac CT6 to be lighter than CTS, get PHEV model

Cadillac is suddenly one of the most talked about automakers in the US with Johan de Nysschen taking control. The brand claims that it eventually wants to become, once again, the standard of the world. One of the first vehicles to actually prove whether that's possible is its upcoming CT6 flagship sedan. We still don't know what the production version looks like undisguised, but other important details are falling into place. The latest big news sheds some light on the Caddy's powertrain and some estimates of its weight and size.
General Motors product chief Mark Reuss dropped the details at the automaker's Global Business Conference. According to The Detroit News, he revealed that the CT6 would use a twin-turbocharged, 3.0-liter six-cylinder engine with an eight-speed automatic transmission, and a plug-in hybrid would be an additional option. He reportedly claimed it would be the most "powerful six-cylinder gas engine in the segment" and said the hybrid could get around 70 miles per gallon.
Reuss also revealed that the CT6 would be about 53 pounds lighter than the current CTS, despite being about 8 inches longer, according to The Detroit News. If that's the case, the new flagship is about 203.5-inches long, which is 1.5-inches more than the XTS.