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2014 Cadillac CTS Vsport [w/video]

Bridging The Gap With Power And Poise
As you read these words, West Coast Editor Michael Harley is preparing to drive the brand-new 2014 Cadillac CTS along the gorgeous, sun-drenched roads of Southern California. And while I'll wait for Harley's full report before I put words in his mouth, I'm willing to bet he enjoys the hell out of Cadillac's new CTS. In fact, I'm sure of it.
I say this with confidence because, about a month ago, I spent the better part of a day flogging the new CTS Vsport around the 2.9-mile Milford Road Course - a challenging circuit laid out in the infield of an oval test track at GM's proving grounds in southeast Michigan. The MRC was built about a decade ago after Bob Lutz was lured out of retirement to work closely with GM's product development team, and thus, this circuit is known informally as the "Lutz Ring." The main objective of the MRC was to have an in-house facility for engineers to fine-tune vehicle dynamics, without having to constantly schlep cars over to Germany's infamous Nürburgring. (Of course, they still do.)

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.

Submit your questions for Autoblog Podcast #326 LIVE!

We're set to record Autoblog Podcast #326 tonight, and you can drop us your questions and comments via our Q&A module below. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
Discussion Topics for Autoblog Podcast Episode #326
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