2004 Cadillac Xlr Base Convertible 2-door 4.6l 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.

Cadillac CT4 and CT5 get meaningful updates for 2021

It's common for vehicles to get an update here or there in between full redesigns every five or six years, but the changes being made for the 2021 Cadillac CT4 and CT5, each just introduced last year, represent more than just a little nip and tuck. For starters, Cadillac's excellent Super Cruise will show up on the options sheets for the two sedans early next year in Enhanced form with with Lane Change on Demand functionality. Super Cruise will be offered on Premium Luxury and V-Series trims only. As we already knew thanks to early order guides, a new 12-inch digital instrument cluster that features driver-selectable themes is also on the menu for 2021. A traditional Tour theme is probably what most drivers will default to, while a Sport theme will likely include red accents and performance-monitoring readouts and a Stealth theme will offer minimal information and what we'd guess are non-distracting colors. CT4-V and CT5-V models will get an exclusive Track theme. New for the CT5 Sport trim level is a V Performance package that adds upgraded suspension bits, Magnetic Ride Control and a mechanical limited-slip differential. V Performance front brake calipers from Brembo are also optional on Sport models. Additionally, a new Diamond Sky special edition package will be offered on Premium Luxury CT4 and CT5 models, adding interior and exterior styling upgrades along with all-season run-flat tires on unique wheels. The package also gets the aforementioned V Performance brakes. Additional updates include wireless Apple CarPlay and Android Auto, SiriusXM with 360L with more than 200 live SiriusXM channels and on-demand programming choices, and a console-mounted rotary infotainment knob that enables left and right clicks to more easily navigate the CUE infotainment system. Buckle to Drive will come enabled from the factory (it can be disabled after purchase) and won't allow the driver to shift into drive unless the seatbelt is buckled. A Teen Driver mode will encourage safe driving from — you guessed it — teens. Forward collision alert, front pedestrian braking, automatic emergency braking and the patented haptic Safety Alert Seat are now standard equipment across the board for both sedans. Check out the image gallery above to see many of the updates, including Super Cruise, the digital instrument cluster and the Diamond Sky edition. Related Video:    

Cadillac upgrades ATS sedan to match new coupe

The big news when it comes to the Cadillac ATS for 2015 is surely the addition of the new coupe model, but that doesn't mean that Cadillac has forgotten about the sedan as well. In fact GM's luxury brand has rolled out a few choice enhancements for the four-door to bring it more in line with the new coupe.
Among those changes that we spotted a couple of weeks ago is a new front fascia that incorporates the brand's new wreath-less emblem, and a sleeker front bumper. The interior has been upgraded as well with new trim options as well as some new tech including Siri Eyes Free functionality, dictated text messaging and optional inductive smartphone charging.
Though the ATS Coupe does away with the base engine, sedan buyers can still opt for the 2.0-liter four with 202 horsepower and 191 pound-feet of torque. The 3.6-liter V6 carries over unchanged at 321 hp and 275 lb-ft, but the 2.0-liter turbo four gets the upgraded torque rating of 295 lb-ft (the highest in the range) to go with its 272 hp. Some new color choices are also among the upgrades you can read more about in the press release below.