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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.

Hotter Cadillac ATS-V+ could use LS7 power

Rumor has it Cadillac is working on an even hotter version of the ATS-V, possibly called ATS-V+. And the latest intel from Motor Trend suggests this new model might have a great, big V8 under the hood. The V8 in question is the high-revving, naturally aspirated 7.0-liter LS7 from the Camaro Z/28. The hand-built engine makes 505 horsepower and 481 pound-feet of torque in the Z/28 – a nice increase over the 464 hp and 445 lb-ft in the standard ATS-V, which uses a twin-turbocharged 3.6-liter V6. Motor Trend says the ATS-V+ will come to market with an eight-speed automatic transmission, as well as the seven-speed manual 'box from the Corvette. A dual-clutch transmission will come to market later. Of course, we'll believe it when we see it. But an LS7-powered ATS-V sure sounds like a great package to us. Here's hoping.

The new presidential limo is almost ready and way bigger than a Suburban

If you're familiar with the current presidential limo, which is nicknamed The Beast, you know it's based on a medium-duty truck platform. This new one, shown in aerial spy photos, appears to be just as huge. The vehicles flanking it in these shots are Chevrolet Suburbans, basically the largest passenger vehicle you can buy. And while the limo looks car-shaped, it's very tall and much longer than the three-row SUV. You might say it's yuge. Like its predecessor, The Beast 2.0 is being developed in secret because all of its various systems and defenses are matters of national security. We are fairly confident that it has lots of armor protection, glass that's about five inches thick, and special systems to clean the air in the event of a biological warfare attack. The current Beast is also said to carry a pint or two of the President's blood type just in case something does happen. When the President is being transported in a motorcade, he is at his most vulnerable, so Cadillac One and the vehicles that surround it have to be prepared for almost anything. In fact, two identical presidential limos travel together to make it harder for would-be attackers to do bad stuff. The Suburban escort it's getting here at the GM proving grounds is appropriate, since most of the vehicles used by the Secret Service to accompany the President's motorcade are big GM SUVs. By the looks of this camouflaged prototype, GM is nearing completion of testing the new Presidential car. The styling is a mix of CT6 sedan and Escalade, with a little XTS thrown in, and it looks a lot more sleek by comparison than the current blocky Beast. When it's ready, President Donald Trump will be the first to ride in it on official business and the current beasts will probably be retired and end up in a museum. Related Video: Featured Gallery Cadillac One Presidential Limo Spy Photos View 13 Photos Image Credit: Chris Doane Automotive Government/Legal Spy Photos Cadillac Luxury Sedan the beast cadillac one