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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.

New Cadillac ELR ad more educational, less controversial than 'Poolside'

Cadillac's first TV commercial for its ELR plug-in hybrid, Poolside, was a smash hit, in that a lot of people saw and talked about it. The 60-second spot didn't say the car was a plug-in, took potshots at the work ethic of all non-Americans and has raked in over a million views on YouTube (you can add one more here). Caddy's new ELR video will get a lot less media attention, but that's exactly the point. Cadillac claims it was happy with the way actor Neil McDonough strutted his way into the controversial ELR discussion. This time around, though, the coupe gets promoted in a more traditional way: with information about the car and what it can do - you know, drive on electricity, capture braking energy into the battery, go further on gas power when needed, those kinds of things – courtesy of GM's executive chief engineer for electrified vehicles, Pam Fletcher. The tone of the video has not been changed because of the Poolside controversy. David Caldwell, manager of Cadillac communications, tells AutoblogGreen that the new video is not destined for TV and is completely different because it's meant for a different audience. "It doesn't have any direct relation to Poolside," he says. "TV advertising is not necessarily the heart of marketing something like the ELR. Notwithstanding the fact that we had a very thought-provoking ad [laughs]." "We definitely have a need to communicate what the ELR is" - Cadillac's David Caldwell The way you reach out to people via the web is different than the mass-media techniques used in spots like Poolside during big TV events (it aired during the Winter Olympics). The two video spots are different because you need to offer different information in different ways, for example having an ELR website as well as an iPad filled with ELR information at the dealership. For Cadillac, TV is "not going to be the predominant methodology," used to sell the ELR, Caldwell said, "the web is closer to what you need to do to reach people. We definitely have a need to communicate what the ELR is. It's not television advertising at all." Caldwell said a handful of other short videos similar to the new one will go live in the near future, showcasing design and powertrain aspects of the car. Keep an eye out for them – just don't look for them on TV. You can watch the new video below.

Such Sweet Sorrow: Cadillac's CTS-V gets an Irish wake

As the saying goes, all good things must come to an end. The honkin', stonkin' second-generation CTS-V, powered by Cadillac's brawny supercharged 6.2-liter V8 has been a very good thing. And now that the 500 final coupes – the only CTS-Vs designated 2015 models – have been built (just five remain unsold as of this writing), it is indeed a good thing that's come to an end. But Cadillac is not letting 2009–2015 CTS-V go gently into that good night, even as its replacement is poised to debut in just in just two months at the 2015 Detroit Auto Show. Instead, Cadillac invited us to Austin's Circuit of the Americas racetrack for what it called an "Irish wake" for the model that has proven to be one of the quickest and most charismatic models in General Motors' history. If you don't know what an Irish wake is, if you envision storytelling, songs, debauchery and more than a little liquor, you'll be in the ballpark. In this case, though, adrenaline substituted in for the booze, with squealing tires and shrieking V8s providing the singing. The debauchery took the form of an all-you-can-drive lapping of COTA in all three bodystyles – coupe, sedan and wagon – and the stories were told by the grins plastered on our faces all day. First and foremost, we'll miss the CTS-V's perfect balance of luxury and sportiness. Even after six years with no major changes, the CTS-V is surprisingly spry. Certainly, you never forget that it's a heavy thing, weighing in anywhere between 4217 pounds for the manual-equipped coupe to 4424 for an automatic wagon, but with 0-60 times of about four seconds and the ability to hit about 150 mph on COTA's back straight, the Vs remain an absolute hoot on the track. Sure, some of its details – the blocky front fascia shapes and the spoiler on the sedan and coupe models, for example – look a bit dated, but the overall design still looks sufficiently badass. The interior design has worn pretty well, too, and however Cadillac may feel about center stack buttons being so last decade, we favor them over the capacitive-touch madness of today's CUE system. We're not going to bother doing another full review of the car here, but suffice it to say, there is plenty we will miss. First and foremost, will be the CTS-V's perfect balance of luxury and sportiness. Rumor has it that Cadillac will offer the 6.2-liter LT4 V8 in the next generation (we predict about 600 hp), but we hear that the new car will skew more toward luxury than balls-out performance.