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Driven: 2020 BMW X7 M50i, M760i and M340i | Autoblog Podcast #623

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by West Coast Editor James Riswick and Road Test Editor Zac Palmer. They discuss news about the Cadillac V Blackwing, as well as some interesting auction listings that we spied. They also talk about cars from the fleet including the BMW M760i, X7 M50i and M340i. Autoblog Podcast #623 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars we're driving 2020 BMW M760i xDrive 2020 BMW X7 M50i 2020 BMW M340i Impala auction listing Cadillac V Blackwing news Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: Nissan Frontier and a mid-engine Mustang | Autoblog Podcast #622

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 to expand V-Series but discontinue CTS-V and ATS-V

Cadillac said Tuesday it will expand its V-Series performance sub-brand with the arrival of the CT6-V sedan in 2019 ( formerly known as the CT6 V-Sport), with plans to add high-performance variants across its portfolio. The flipside to that expansion is the sunsetting of its two existing V-Series performance cars, the ATS-V (both coupe and convertible) and CTS-V sedan. Two new unspecified sedans will slot below the CT6 in Cadillac's lineup, a spokesman said. The CT6-V will arrive next spring, roughly a year after it bowed at the New York auto show. It will feature Cadillac's new "Blackwing" V8, a twin-turbo engine that displaces 4.2 liters and produces an estimated 550 horsepower and 627 pound-feet of torque, sending it through GM's new 10-speed automatic transmission to drive all four wheels. A less-aggressive version of the engine will also appear in the CT6 Platinum model, offering 500 horsepower and 553 lb-ft of torque. "Beginning with the debut of the CTS-V Sedan in 2004, the V-Series sub-brand sparked new life into Cadillac," Mark Reuss, executive vice president and president of GM Global Automotive Group and Cadillac, said in a statement. "As a result of the overwhelming response the CT6 V-Sport received when revealed in early 2018, we've decided to formally make it a V-Series, signaling the expansion of V-Series." View 61 Photos A Cadillac spokesman tells Autoblog the 2019 model year will be the last for the ATS-V and CTS-V. The ATS-V is powered by a twin-turbo 3.6-liter V6 that's good for 464 hp and 445 lb-ft of torque, an increase of 262 hp and 173 lb-ft from the base, four-cylinder ATS, which is also set to go to pasture at the end of the 2018 model year. The CTS-V, meanwhile, boasts a 6.2-liter supercharged V8 under its carbon-fiber hood that puts out 640 horsepower and 630 pound-feet of torque, good for a 3.7-second 0-60 mph time and a top speed of 200 mph. In a Quick Spin review last year, Autoblog Editor-in-Chief Greg Migliore called the car "old-school muscle in an Esquire-approved suit. It's 'roids and cufflinks." As for what's next for an expanded V-Series, Cadillac has the new XT4 crossover, and already other companies are banking on performance versions of crossovers. Cadillac's also developing a less expensive luxury sports sedan called the CT5. It's also said to be planning a production version of the Escala concept starting in late 2021, so those could be possibilities.