1984 Cadillac Eldorado Biarritz on 2040-cars

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GM extending warranties on Cadillac CTS-V and Chevy Camaro ZL1 for supercharger issue

Okay General Motors, we've sat by and watched you recall the compact cars, crossovers and pickup trucks, and aside from reporting on it, we've been fairly quiet. This, though, this will not do. We can almost tolerate the recalls on the bread-and-butter cars, but leave the performance vehicles alone.
According to a report from The Car Connection, GM has discovered a problem with the superchargers of the 6.2-liter V8s found in the Chevrolet Camaro ZL1 and the Cadillac CTS-V. Apparently, the issue rests around the internal bearing shaft grease, which can become contaminated (we aren't sure with what). If left unchecked, it'll first lead to a rattle at idle, which goes away under slight throttle. The real warning stage is when a high-pitched squeal develops, signaling that the bearing shaft has failed. Naturally, severe engine damage is the next step (although it's possible that the engine will also just refuse to turnover, although neither case is desirable).
According to TCC, GM will replace the superchargers on vehicles that have exhibited symptoms of bearing shaft failure free of charge. It will also, allegedly, be extending the warranty on all supercharged ZL1s and CTS-Vs to 10 years or 120,000 miles (whichever comes first), from the date of purchase. Officially, only 2009 to 2013 CTS-Vs and 2012 to 2013 ZL1s are suffering from this issue.

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.

2016 Cadillac CT6 First Drive [w/video]

Cadillac moved to New York, renamed its cars and crossovers, and made cutting-edge technology one of its pillars. It's fighting hard to attract new customers and kill its outdated reputation as an old-man car brand in the United States. Change happens slowly, and then sometimes, all at once. Enter the 2016 Cadillac CT6. This is Cadillac's range-topping sedan. It's almost as long as the Mercedes S-Class and BMW 7 Series, yet in some configurations, it's lighter than their smaller siblings, the E-Class and 5 Series. The CT6 is a rolling showcase of General Motors' latest and best technologies, with potential breakthrough features like Super Cruise semi-autonomous driving waiting in the wings. It comes in a wide variety of flavors. The CT6 starts as low as $54,490 with a four-cylinder engine and rear-wheel drive, which is the car that Cadillac hopes will be cross-shopped with the mid-tier Germans. The top-end CT6 Platinum with all-wheel drive and the 404-horsepower V6 begins at $84,460, and it could make S-Class and 7 Series buyers rethink American luxury. Put simply, the CT6 means everything to Cadillac, but it will mean different things to its customers. It can be the executive chauffeur with all the backseat accouterments. Or it can be the massive yet somehow kinda sporty and nimble rear-wheel-drive sedan that weighs only 3,657 pounds. We tried both versions and came away impressed with both the strategy and the execution. It's a little strange to think that Cadillac doesn't offer a V8 in its biggest sedan. Taking the wheel on a sunny, cool day in rural San Diego County, we wonder if a 2.0-liter four-cylinder engine has what it takes to really move this giant. Our concerns quickly dissipate – this engine is also under the hood of the Chevy Camaro, and its 265 hp and 295 pound-feet of torque are more than up for the task. The big sedan handles curvy mountain roads adeptly. There's not a lot of roll for a car this size, even when we're aggressively whipping through tight turns. This poise comes from the CT6's rigid, lightweight aluminum and steel structure called Omega. We switch through the driving modes but settle on sport for the dash to the lunch spot. The steering is surprisingly tight and the brakes have strong response with little pedal travel. After a quick bite in an old mining town called Julian, we take off in the spotlight CT6, the Platinum trim, powered by the 3.0-liter twin-turbo V6. It's an enjoyable car to stretch out on the highway.