2003 Cadillac Escalade on 2040-cars

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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.

How the demise of Lincoln's Town Car has kick-started a limo revolution

The deaths of the Ford Crown Victoria and the Lincoln Town Car have meant overhauls of three high-profile American fleets: police, taxi and livery car. Just as police fleets are more open to considering other options and a Nissan van is the new face of the NYC taxi, livery car companies are looking at replacements for the Town Car beyond The Blue Oval. Ford, via Lincoln, has made an MKT Town Car (pictured), but an article in the Detroit News claims "it has failed to win over most of the big limousine companies." The upstarts trying to move in include livery and limo editions of the Cadillac XTS, and livery specifications of the Toyota Avalon and Chrysler 300.
Each of those challengers, however, faces challenges. The Town Car was a workhorse, American, rear-wheel-drive sedan with plenty of rear legroom. Cadillac has been in the livery space before but with decontented models that were about selling the brand, not its luxury. It is taking the opposite approach with the XTS, pointing out that its livery edition is "contented in the upper half of the XTS range." Still, the CEO of Michigan's largest livery company says "it's quite a bit smaller than what we're used to," and he also prefers rear-wheel drive.
The Chrysler 300 is rear-wheel drive, and American, which matters to some companies, but Chrysler hasn't yet revealed the livery package for it. The livery Avalon marks Toyota's first time getting into that business in the US, a natural step after having done so well with taxi clients and with the Town Car out of the way. Still, the livery client is a different to taxi buyers, so the Avalon could face other soft-touch hurdles.

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.