1994 Cadillac Deville Base Sedan 4-door 4.9l on 2040-cars

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Here's how Cadillac made its Magnetic Ride Control suspension quicker and smarter

Bugatti makes the world's fastest car, but Cadillac claims it has developed the world's fastest suspension. Its fourth-generation Magnetic Ride Control technology receives hardware and software tweaks to deliver a more comfortable ride and sharper handling. It's offered on some variants of the CT4, CT5 and the Escalade. Introduced in 2002 on the Seville STS, this self-adjusting suspension is not as complicated as it might sound. It relies primarily on electromagnets that emit a magnetic field, and a magnetorheological fluid whose viscosity changes depending on the strength of the magnetic force. Sensors scan the road up to 1,000 times per second and send the information they gather to the electromagnets, which then alter their magnetic field as needed to modify the fluid's viscosity. The fluid is in the shocks, so making it thicker returns a firmer ride, and vice versa. In simpler terms, Magnetic Ride Control leverages chemistry and physics to make the ride sporty, comfortable, or somewhere in between -- all in the blink of an eye. By reacting to the changing magnetic field, the fluid-filled shocks filter out road imperfections and maximize tire contact with the road to deliver more precise handling. Cadillac began developing the fourth-generation system by improving the hardware. The in-wheel accelerometers are more accurate than before, the inertial measurement unit is more precise, and the damper fluid formula was changed for quicker response times and a smoother ride. Engineers then turned their attention to the system's software. They notably gave the sensors the ability to process a wider selection of input and output signals, which translates to a wider spread between comfort and sport. And, they made the response time up to 45-percent quicker. All told, the fourth-generation Magnetic Ride Control technology performs better under heavy braking and hard cornering, it delivers more consistent performance, and it reads the road more accurately. Cadillac proudly notes these are the most comprehensive updates it has made to the system in nearly two decades. Magnetic Ride Control comes standard on the 2021 CT4-V and the 2021 CT5-V, and it's bundled into the CT5's V Performance package, which also includes a mechanical limited-slip differential. It's also standard on the Sport and Platinum variants of the 2021 Escalade, and it's part of the Premium Luxury trim's Performance package.

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.

GM's redesigned full-size 2021 SUVs face delay over coronavirus

As General Motors works to conserve cash for the coronavirus pandemic, the automaker reportedly told suppliers that it is postponing development of several future vehicles. The situation may cause GM to delay the launch of the 2021 Cadillac Escalade, GMC Yukon, Chevrolet Tahoe and Chevrolet Suburban SUVs, which had been planned to roll out in April. The original launch plan for the redesigned full-size SUVs, which are some of the most profitable vehicles produced by GM, had called for production of the current models to end at its plant in Arlington, Texas, this week. After a retooling process, the redesigned SUVs were slated to begin production late in the month of April. In an email to suppliers viewed by Reuters and confirmed as authentic by GM, the automaker also said it was suspending development work on six future vehicle programs, including updates of the Chevrolet Equinox, GMC Terrain, Cadillac XT4, Bolt EV, Chevrolet Silverado and GMC Sierra. GM said preproduction work on those programs would be pushed back to calendar year 2021, with most of the updated vehicles scheduled to be launched as 2022 models. According to the Detroit News, work has also been paused on the Chevy Camaro and a future version of the Corvette that has yet to be unveiled and wasn't planned for production during the 2020 calendar year. Last week, the automaker told employees and suppliers it was delaying work on some future vehicles while pushing ahead with near-term models such as its redesigned full-size SUVs and the GMC Hummer EV, Cadillac Lyriq, Chevrolet Bolt EUV and Cruise Origin, as well as its new Ultium battery system. A GM spokesman who spoke with Reuters reiterated on Monday what the automaker had said last week — that the situation with its U.S. plants was "fluid" and that the automaker would "continue to evaluate" whether and when to reopen those plants on a week-by-week basis, with "employee safety" guiding that decision. GM said previously that it was closing most of its U.S. plants indefinitely. In its Monday email, GM asked suppliers to stop work on all pre-production tooling and pre-production parts manufacturing, but also not to dispose of any tooling or materials. GM told Reuters it had solicited volunteers from its workforce to finish the build-out of the current SUVs on a single shift in Arlington.