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Fullsize GM SUVs have a problem that's making owners sick

Some fullsize SUV owners are getting sick, thanks to a buffeting and vibration problem in 2015 model year examples of the Chevy Tahoe and Suburban, Cadillac Escalade, and GMC Yukon. According to owners' complaints to the National Highway Traffic Safety Administration, the issue can vary from an annoying vibration inside the cabin to an experience so severe that it leads to dizziness and headaches. General Motors is aware of the complaints, but the fix isn't so simple. According to spokesperson Tom Wilkinson to Autoblog, the company "has been tracking this issue for a while." The problem has a fairly low incidence rate, but when it does occur the issue can be "uncomfortable and annoying for owners." There's no precise cause for the issue, Wilkinson claims, and in some cases, simply balancing the tires or changing the door seals can make it go away. However, not all of the fixes are so simple. AutoGuide dug deep into the problem and discovered a GM preliminary information bulletin that advised dealers to remove the headliner and to check the roof's bonds to the bows that go across the vehicle. However, that document included a note that the solution might not entirely eliminate things. According to AutoGuide, adding Dynamat insulation to the roof sometimes helped the problem. A GM spokesperson also told AutoGuide the company fixed the problem at the end of the 2015 model year, and didn't go into any more detail. This roof issue seems linked to some of the worst droning in these SUVs. According to one complaint from a 2015 Suburban owner to NHTSA: "Roof will not remain attached to the roof bows. This causes the buffeting similar to a window being down when all are up. The results span from annoying to painful." A 2015 Yukon owner claims to have another alleged cause for the problem in a NHTSA complaint from February 2015. This person brought their SUV to the dealer seven times over the course of four weeks for vibrations. The dealer replaced the driveshaft, suspension components, and more, but nothing worked. According to an engineer to the service adviser: "In an effort to prevent roll overs, they designed the frame and body mounts too stiff. There are 40 engineers working on issues, they have no solutions that work across the board." Wilkinson told Autoblog that GM is working with customers on an individual basis to rectify things. Since these are newer vehicles, dealers should also fix the problem under warranty.

Cadillac ATS sedan is in its last year

Cadillac has just confirmed that the ATS Sedan dies at the end of the 2018 model year. In an e-mail to CarBuzz, spokesman Donny Nordlicht wrote, "Production of the ATS Sedan is ending due to extensive plant upgrades, expansion and re-tooling to prepare for the next generation of Cadillac sedans." The admission confirms several months of deduction based on a document trail put together by The Truth About Cars. Last December, TTAC reported that General Motors didn't list a 2019 Cadillac ATS sedan on VIN documents submitted to the National Highway Traffic Safety Administration. Only the coupe remained, the presumption being that 2018 would be the last year for the sedan. That presumption was bolstered by industry sleuth Bozi Tatarevic's discovery this week that GM hasn't included the ATS sedan in the carmaker's fleet order guide. The death of the four-door ATS won't surprise anyone paying attention to statements from Cadillac or ATS sales figures. Brand then-president Johan de Nysschen strongly hinted last summer that three sedans would bite the dust come 2019, and one would be refreshed. We've seen the gussied-up CT6, so that put the XTS, CTS, and ATS in the funeral home. The XTS would die an unavenged death, while the CTS downsized into the properly midsized CT5 and targeted buyers in the $35,000 to $45,000 range, overlapping with $34,595 ATS sedan pricing by doing so. The ATS would go on hiatus, eventually resurrected as a compact luxury offering possibly called CT3 in coupe form and CT4 as a sedan sometime around 2020. As for the market situation, ATS sales are up 7.3 percent in the U.S. through the end of April this year compared to 2017. However, the ATS sold only 13,100 units in the U.S. in 2017, compared to 21,505 units in 2016 and a high of 38,319 in 2013, its first full year on sale. Assuming new Cadillac president Steve Carlisle stays the predicted course, GM might keep the ATS Coupe as a lure to sporty buyers in the segment until a possible CT5 coupe arrives. Otherwise, Nordlicht's e-mail said "Cadillac's future sedan portfolio will consist of three sedans, positioned in different segments and clearly differentiated by size and price." The 2019 ATS Coupe will stick with its three current engines, the 2.0-liter turbo with 272 horsepower and 295 pound-feet of torque, the 3.6-liter V6 with 335 hp and 285 lb-ft, and the 3.6-liter twin-turbo V6 in the ATS-V with 464 hp and 445 lb-ft of torque.

Combine a self-driving car with V2V, and here's what happens

Transportation engineers have started laying the groundwork for a traffic world in which cars communicate with other cars and infrastructure like bridges and traffic lights. How about an environment in which cars talk to pretty much everything and everyone? In a preview of its offerings at the upcoming Consumer Electronics Show, Delphi Automotive will deploy just such a concept. Engineers have designed a system that communicates with traffic signals, street signs, pedestrians, cyclists, even to fry pits and parking garages along a driver's route. To date, engineers and researchers across the auto industry have focused on the technical and safety-oriented foundation of future vehicle-to-vehicle communications, which could help cars share information about everything from traffic tie-ups to upcoming road hazards. Beyond those building blocks, many have projected that V2V could also include more consumer-focused features. Delphi's system, dubbed V2Everything, might be the first that combines those sorts of features in a tangible package. At CES in Las Vegas, scheduled to begin the first week of January, company officials say they'll demonstrate in real-world conditions how V2V technology can be used in an autonomous vehicle to provide a range of critical safety information and leisure and convenience options for riders. The first V2V technology installed on a production car is slated to appear on the 2017 Cadillac CTS. "We imagine a world with zero traffic accidents," said Jeff Owens, Delphi's chief technology officer. "To get there, we will need a convergence of active safety, sensor fusion, connectivity platforms and advanced software." Such software might allow a vehicle to start searching for and reserving parking spots at a programmed destination long before arriving. It could allow riders to place their McDonald's drive-through order from the road and have the food ready for pickup along the route. For the drive itself, the Delphi-equipped car can stay updated on the status of traffic lights around Las Vegas, and can anticipate yellow and red lights. Using smart-phone technology, the car can detect pedestrians and cyclists that may otherwise be hard to see. It can send messages to friends or family to notify them of a driver's location. Some of those features have been available on third-party apps or individually developed by automakers. But this system marries them together in a single system that is tailored for use in self-driving cars.