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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 CT6 hybrid likely to appear in Shanghai

Cadillac is poised to reveal a hybrid version of the CT6 sedan later this month at the Shanghai Motor Show. Rumors have swirled of the sedan's pending reveal, and General Motors product chief Mark Reuss reportedly confirmed its existence last fall during an investor conference. On Wednesday, Reuss again said that GM is working on the hybrid CT6, and when asked by Autoblog, he hinted at the pending debut. "We've really got to wait until we finish rounding out the portfolio," he said. "The Shanghai show is where you should look for all of it. So stay tuned." A Cadillac spokesman declined to comment, but confirmed "we will add variants." The brand has already announced two V6 engines and is looking to expand the line. Reuss also said GM has considered a V-Series model for the CT6, but it's focusing on launching the four-cylinder and V6-powered sedans first and promoting V-Series versions of the CTS and ATS that arrive this year. "The [CT6] architecture is certainly capable of doing it," he said. "The question is who's going to buy the CT6? What kind of person? And do we need a V-Series off of that is the question we haven't answered yet. It's certainly capable of doing it ... we've certainly thought about it." Details of the hybrid powertrain aren't known, but it could use plug-in technology. Chevrolet announced the 2016 Malibu will get a hybrid model that employs electric powertrain features from the new generation of the Volt. For the CT6, electric-vehicle technologies would likely be used to extend range and aid the performance of the conventional engine. Related Video:

Cadillac CTS-V gets Stealth Blue and Silver Frost limited edition models

A little more than a year and a half ago, former weekend editor Alex Nunez and I were talking about how sweet it would be for Cadillac to offer a CTS-V in the Corvette's Supersonic Blue paint, and as if General Motors eavesdropped on our conversation, this showed up. And while the Stealth Blue car you see here isn't an exact duplicate of the hot-looking sedan GM showed off in prototype form, it's really close. And really sweet.
New for 2013, the Cadillac CTS range gets two new colorful editions, starting with the Stealth Blue package available on the CTS-V (in sedan, coupe and wagon bodystyles) as well as the naturally aspirated CTS coupe. In addition to the unique paint, blacked-out grille and dark satin wheels, Stealth Blue cars can also be done up with an optional Twilight Blue leather interior. (And you thought blue-on-blue color schemes died in the '90s.)
Cadillac is also offering a new Silver Frost package, but it's a bit more exclusive. Only 100 examples will be built, all in CTS-V Coupe form. The Silver Frost paint is a low-gloss matte finish, in that while it technically has a clearcoat covering, it's reduced in a way that the surface still appears flatter than standard paint. Even so, Cadillac states that the car should be hand-washed only.