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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.

Want to beat LA traffic? Chargers QB Philip Rivers has found a way

Slogging through traffic in Southern California is about as pleasurable as being slowly eaten by bears or being the awkward third wheel on a bad first date. It feels like it's never going to end. After the team relocated to Los Angeles from San Diego, Chargers quarterback Philip Rivers decided that three hours wasted each day in a car was too much. As The San Diego Union-Tribune reports, Rivers' rolling office makes his days more productive than ever. After deciding that he wasn't going to relocate his family to Orange County, Rivers was stuck with the prospect of either spending considerably less time with his children or skipping out on much-needed film work at the team's training facility (not really an option given his profession). Instead, he began investigating a number of options to make his lengthened commute slightly more viable and productive. First, he considered carpooling with a teammate. That was still too much of a pain. He looked at flying a helicopter, but unless it could land close to both his home and the practice field, it too was useless. A quick online search eventually led to the rolling footage review room you see here. Becker Automotive Design in Oxnard, Calif., builds these rolling offices for a wide range of customers. It sells modified Mercedes-Benz Sprinters, Ford Transits, and, in Rivers' case, a Cadillac Escalade with a raised roof. His needs were simple: a television and an HDMI input so he can hook up his computer. No fancy armor or recumbent exercise bicycle. His goal was to review game footage on his commute rather than slowly waste away behind the wheel of a car. Photos show a sea of leather and wood and a mini fridge, so it's not totally without niceties. Column | Philip Rivers' new ride allows him to stay home https://t.co/btwCEgIsFq pic.twitter.com/DHud3ho5UF — The Union-Tribune (@sdut) September 5, 2017 The Union-Tribune lists the price of the Escalade at about $200,000. That's not including the driver's salary. In 2015, Rivers signed a four-year deal with the Chargers worth $84 million, so he's not hurting for cash. If it increases productivity and saves the headache of being behind the wheel in traffic, we can imagine more people with means (and not just quarterbacks) will be opting for such daily transport. Related Video:

GM removes start/stop from full-size trucks and SUVs with V8 engines

GM is removing start/stop technology from a number of its popular full-size SUVs due to the ongoing chip shortage. This follows the removal of cylinder deactivation technology from some of its trucks, which was also due to the chip shortage. GM Authority first reported the news, but we’ve just confirmed everything with a GM spokesperson.  The following 2021 model year vehicles will be affected: Chevy Tahoe, Chevy Suburban, GMC Yukon, Cadillac Escalade, Chevrolet Silverado 1500 and GMC Sierra 1500. Only versions of those vehicles built with the 5.3-liter V8 or 6.2-liter V8 and mated to the 10-speed automatic will have the tech removed from them. Only vehicles manufactured on or after June 7 will be affected. “By taking this measure, it will enable us to continue production of our high-demand full-size SUV and pickups as the industry continues to rebound and strengthen,” GM said in a statement. Those who ultimately buy one of these vehicles without start/stop technology will receive a $50 discount off MSRP for their troubles. Losing this fuel-saving tech could be a big negative for some, but we know many folks turn it off anyway. Not having to press the button to deactivate start/stop every time could actually be a positive if youÂ’re part of the camp who does that already. 2021 Cadillac Escalade Sport Platinum View 27 Photos On the downside, GM says “most of the affected vehicles will experience a minor reduction in fuel economy.” We donÂ’t have revised window stickers in hand to know how each model will be affected, but any 1 mpg reduction will be rather impactful for vehicles rated as low as these trucks already are. Any reduction will be seen in the city mpg rating, so take the kind of driving youÂ’re going to be doing into account before purchasing. When it comes to greenhouse gas compliance rules, GM says it doesnÂ’t foresee this impacting the companyÂ’s average fleet score. It also intends to begin adding start/stop back to these models as soon as possible, but there will be no retrofit effort made to fit the tech to vehicles already built without it. “Our supply chain organization continues to make strides working with our supply base to mitigate the near-term impacts of the semiconductor situation,” GMÂ’s statement reads. “GM continues to leverage every available semiconductor to build and ship our most popular and in-demand products, including our highly profitable full-size trucks and SUVs for our customers.