2009 Cadillac Dts Platinum /no Reserve.leather/heated/onstar/xenons/rebuilt 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.

Best sport sedans for 2022 and 2023

SUVs dominate the car industry at every size and price level, but some people still prefer the looks, and more importantly, the performance and comfort, of the traditional sedan. With a lower ride height, lighter weight and generally smaller size, they often are much more fun to drive, and can even be more comfortable. Sport sedans of course lean harder on the performance side of things, and are among the best options for sheer speed and fun, thanks to those inherent characteristics. We've rounded up the ones in the segment that do the sporty dance better than any others in 2024 to give you a handy guide when you're shopping for one of your own. You'll find a wide array of cars here including gas, electric and hybrid powertrains. They'll have manual and automatic transmissions and drive the front, rear or all four wheels. Technically a few hatchbacks have slipped in, but they're close enough in look and feel that we wanted to include them. And excluding them means you might miss out on some of the best-driving options available. You wouldn't want that, would you? Alfa Romeo Giulia Why it stands out: Punchy four-cylinder; astounding power from Quadrifoglio; light and nimble character; awesome shift paddlesCould be better: Clunky infotainment; sub-par switchgear Read our Alfa Romeo Giulia review We start this list with one of the most predictable inclusions: the Alfa Romeo Giulia. Yes, it's a stereotype that the Italian sport sedan is fun to drive, but the fact is, well, it is. The Giulia comes standard with a turbocharged 2.0-liter four-cylinder making 280 horsepower, making it one of the most powerful four-cylinders in the segment. It's paired with a snappy and smooth eight-speed transmission and either rear-wheel or all-wheel drive.  The engine is lively and torquey, if a little short of revs, and the chassis feels super-light. The steering is eager and the car jumps into corners. We also highly recommend getting a version with the enormous and superb aluminum paddle shifters that make clicking through gears much more entertaining. And on the topic of the interior, it's attractive, but the various switches and knobs feels a little cheap, and the infotainment system is clunky. Of course there's also the incredible Giulia Quadrifoglio at the high end. It gets a Ferrari-derived twin-turbo 2.9-liter V6 making 505 hp, and it's rear-wheel drive only.

Super Cruise’s failsafes

Even though Super Cruise is not a fully autonomous system, it incorporates redundancies like those used in aircraft to ensure failsafe operation. Before taking off on a 700-mile, 11-hour test drive of the system — and putting my life in its hands without my hands on the wheel — I sat down with Daryl Wilson, lead development engineer for Super Cruise, to get a deep dive into the system and its critical safety backups. Autoblog: First, what makes Super Cruise different from similar systems? Wilson: The key differentiator for Super Cruise is hand-free driving. It's an industry first in that respect. Our competitors require the driver at minimum to place their hands on the wheel with some frequency to ensure that the car knows that the driver is there. We don't. Two key technologies allow us to do this. One is our Driver Attention System, which is our methodology for making sure the driver is engaged with the vehicle and engaged with the road. This is a driver assist system, not a fully autonomous system. So it requires driver engagement. We use an infrared camera that constantly monitors the driver's face to determine the direction they're looking. We're looking for the driver to be what we call on-road — not on the center stack, not to left or right or down. That's all done by the tracking of the face. We also track that the eyes are open. It's infrared because at night you need to illuminate the face and you can't be shining a light into the driver's face. Then we have our lidar mapping that provides a foundation for control and redundancy to ensure safe performance. Autoblog: How does the mapping act as a redundant feature? Wilson: This system is only for use on divided, controlled access highways. What I mean by a divided highway is something more than a painted line between you and oncoming traffic. Whether that's a grassy area in between the lanes or a concrete barrier, anything that separates you from oncoming traffic. That's the divided highway part. The controlled access part is entrance ramps and exit ramps. Not with roads that cross at grade, with traffic crossing at the same level. To do that we geofenced these roads to ensure that operation is only allowed in these conditions. We don't just recommend you use it there; we ensure that you only use it there.