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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.

GM might share the Chevy Volt's powertrain tech with rivals

Car shoppers might eventually find the award-winning powertrain from the second-generation Chevrolet Volt under the hood of another automaker's vehicle – at least if General Motors global powertrain chief Dan Nicholson gets his way. According to Automotive News, Nicholson would be open to partnerships with other companies to share the range-extended setup. "We want to be the partner of choice in propulsion system development in this complex and turbulent era we are approaching," he told the trade publication. For an automaker that wants an electrified solution, the Volt's system would be an easy choice. It combines a 1.5-liter four-cylinder with two electric motors and an 18.4-kWh lithium-ion battery. The EPA estimates the setup is good for 106 MPGe combined and 53 miles of EV range in the Volt. Wards selected the powertrain for its 10 Best Engines list for 2016, and the Chevy won the Green Car of the Year Award. According to Automotive News, a partnership could have serious financial implications for GM and its collaborator. Rival automakers could get a competitive powertrain without the huge expense of research and development. Meanwhile, The General would benefit from larger economies of scale to drive down prices. Don't look for the Volt's powertrain to arrive in other vehicles too soon, though. GM spokesperson Kevin Kelley told Autoblog that he was "not aware of anything going on" in regards to negotiations with other automakers. In the meantime, we'll keep our eyes open for companies borrowing the Bowtie's advanced tech. Related Video: Related Gallery 2016 Chevrolet Volt: First Drive View 24 Photos News Source: Automotive News - sub. req.Image Credit: Copyright 2016 Sebastian Blanco / AOL Green Chevrolet GM Technology Hybrid Videos Sedan

GM's MPG overstatement could affect 2 million vehicles

Late last week, GM admitted that three of its large SUVs fuel economy window stickers did not match their actual efficiency ratings, and so the vehicles couldn't be sold. The stickers on the 2016 Chevy Traverse, GMC Acadia, and Buick Enclave said their ratings were one to two miles per gallon better than they should have been. Officially, the number of affected vehicles sits at about 60,000. But Consumer Reports makes a good point: what's up with all of the previous model year SUVs that are basically the same vehicle? To wit: the 2016 model year vehicles are not substantially different than the 2015 or the 2014, or even going all the way back to 2007. On the EPA's fuel economy website, all of these older models will "have better stated fuel economy numbers than the new vehicles in GM's dealerships," Consumer Reports noted. CR's best point, and the one that makes the 60,000 number potentially grow to 2 million if all of the vehicles built on this platform are affected, is that "[i]t seems unlikely that the company would change the powertrain on these carryover models so late in their model cycles in a way that would cause a dramatic, negative impact on fuel economy." GM says that earlier model year SUVs are not affected and the EPA did not respond to CR's question about the potential for more discrepancies. We've seen automakers reverse course before, so if GM has to come out with a mea culpa soon, don't be surprised. GM is rushing corrected stickers to dealers so that the SUVs can be sold again, but a fix for the already-sold vehicles could be trickier to solve. Related Video: Related Gallery 2013 GMC Acadia View 16 Photos News Source: Consumer Reports Government/Legal Green Buick Chevrolet GMC Fuel Efficiency mpg gmc acadia chevy traverse