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Why an independent rear suspension for GM's new, full-sized SUVs wasn't easy

A Motor Trend report last month laid out how Cadillac's 4.2-lier twin-turbo Blackwing V8 could be an orphan due to cost concerns in the GM empire. Last-minute chassis changes to Cadillac's new sedans and XT6 crossover led to engine bays that couldn't fit the Blackwing. On the SUV side, according to the report, the new independent rear suspension for big people haulers cost so much to implement that GM ruled out reworking the Escalade to accept the Blackwing. At least one commenter rightly asked how could a suspension swallow that much money. A new piece in Motor Trend has the answer. The excellent Alissa Priddle spoke to Tim Herrick, GM's executive chief engineer for full-size trucks, about why the clean-sheet IRS cost "multimillions of dollars."  First, GM would need to build a new body shop at the Arlington, Texas plant that assembles the automaker's big SUVs to stamp the numerous wholly new parts and panels accommodating an IRS. Then GM would need to design and pay for a new assembly process. On top of those up-front costs, there was the incremental cost of the four-link IRS components being more expensive than those in the trucks' former leaf-sprung solid axles. Herrick endured so many rejections for so long that he remembers the date and time when he got approval for the new unit. He said it came down to a meeting where he told a higher-up, "I'll make you a deal: If we get to the reveal, or if we launch this and you think this was a dumb idea, I'll hand you my badge and let you walk me out." Head to Motor Trend to read the full story. Based on Herrick being on stage to help present the new SUVs to the press, and on our First Ride in the new Chevrolet Tahoe and Suburban at GM's Milford Proving Grounds, it appears this will have a happy ending for all involved. Furthermore, since Herrick worked on the T1 platform that supports the big SUVs as well as the light- and heavy-duty pickups, he understood the demands on the commercial side, too. That could be why when Roadshow asked Tim Asoklis, chief engineer of the Tahoe and Suburban, if the new IRS could endure life in the Chevrolet Silverado and GMC Sierra, Asoklis answered, "Oh, absolutely." Related Video:    

2019 Cadillac ATS-V, CTS-V get cool color, weird name

A lot of special-edition cars are really not all that special. They consist of some special paint combo, and maybe a couple of optional features made standard. The Cadillac ATS-V and CTS-V Pedestal Editions are actually pretty much that. But they make up for the mild content list with a really nifty color, great exclusivity and also a weird name. They also help celebrate the ATS-V and CTS-V before they disappear from the line. First let's take a look at the color. It's a shade called Bronze Sand Metallic. It's an earthy, dark brown with a yellow-green tinge to it. We suspect it probably looks more impressive in sunlight, and it's unlike most browns we've ever seen. It's sure to garner attention in any parking lot stuffed with black, silver and white luxury cars. It's matched with sand-colored ultrasuede inserts and bronze-threaded carbon fiber trim on the interior that look sumptuous. Each also comes with carbon fiber exterior trim, red brake calipers, and the CTS-V adds the performance data recorder and Luxury Package. The name really is strange, though. Cadillac says, "The special-edition variants are named in tribute to Cadillac V-Series' time spent at the pinnacle of luxury high-performance." So it seems the thinking was that these cars are up on a pedestal compared with other performance luxury cars. But even in that sentence from Cadillac, there's a word that would be better and more recognizable for excellence: pinnacle. We can think of other great words for marking the peak or the top of performance and luxury, words such as "apex" or "climax." Well, maybe not that one. One of the big appeals of these cars is that there won't be many of them. There will only be 300 built, and that's the total between the ATS-V coupe and CTS-V sedan. The final total for each model will be determined by orders. Ordering opens up on the first week of November, with production coming at the end of that month. The cars will only be available to buyers in the U.S., Canada and the Middle East. There are significant price differences between the two cars. The ATS-V coupe starts at $77,090, while the CTS-V starts at $102,590. That puts the ATS-V at roughly $10,000 more than a base model, and the CTS-V at roughly $12,000 more than its base model. Related Video: Featured Gallery 2019 Cadillac ATS-V and CTS-V Pedestal Edition View 9 Photos Image Credit: Cadillac Cadillac Coupe Luxury Performance Sedan cadillac ats-v

GM doubles miles open to its Super Cruise technology

DETROIT — General Motors said on Wednesday owners of certain vehicles equipped with its Super Cruise assisted driving system will now be able to use it on 400,000 miles (643,740 km) of North American roads, doubling the current operating area as Tesla and other automakers race to deploy hands-free cruising technology. GM's Super Cruise system, like Tesla's Autopilot system, is a driver assistance system, and does not enable true autonomous driving. Spurred by Tesla's aggressive deployment of Autopilot, and Tesla Chief Executive Elon Musk's promises of a more advanced "Full Self Driving" system, GM, Ford, Volkswagen and Mercedes-Benz are racing to deploy competing partial automation technology in major markets. At the same time, safety regulators are showing concern that drivers do not understand that Autopilot and similar systems are not designed to take over driving in every circumstance. The GM system's sensors and software allow a motorist to cruise with hands off the wheel on highways that have been mapped in detail. But the driver is expected to stay alert and ready to take over the car. GM uses technology to monitor the driver, and Super Cruise will sound alarms or slow the car to a stop if it detects that a driver is not responding. Starting later this year, GM plans to enable vehicles equipped with Super Cruise and the company's latest vehicle electronic system to operate hands-free on major, undivided highways in the United States and Canada, as well as additional miles of divided, interstate highways. Currently, Super Cruise operates only on interstate, divided highways. The expansion, enabled by wider digital mapping, will allow owners of properly equipped GM vehicles to cruise hands-free on stretches of Route 66 and the Pacific Coast Highway in the U.S. West or the Trans-Canada highway in Western Canada, GM said. Many of the new roads GM has mapped are in rural, heartland states where GM pickup trucks are popular. GM plans to offer Super Cruise as an option on its Chevrolet Silverado and GMC Sierra large pickups later this year. GM has said previously it intends to offer Super Cruise as an option on 22 models by the end of 2023. Depending on the model, Super Cruise costs $2,200 to $2,500 to add as an option. (Reporting by Joe White in Detroit; Editing by Matthew Lewis) Related video: Cadillac Chevrolet GM GMC Technology Super Cruise