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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:    

Cadillac XT4 crossover reveals its lighting

The upcoming Cadillac XT4 compact crossover has once again been spotted, this time with less camouflage and an update to its lighting. Specifically, the little crossover is sporting production lighting front and rear, and it's sure to make the luxury SUV one of the boldest-looking Cadillacs. Part of the reason for this comes from the taillights. As we suspected from the last set of spy shots, the XT4 will have highly distinctive lights that run the full height of the C-pillar. Though it's a similar design to that of the Escalade, it's made more interesting by the significant forward rake of the rear pillar. Not only that, but that pillar is quite thick, too. The look is actually reminiscent of the old CTS wagon. Moving around the side, the reduced camouflage reveals that the doors and quarter panels are fairly conservative and lacking in many creases or bulges. We can make out the edges of what will likely be black plastic fender flares and rocker panel cladding. Finally reaching the front, we see that the headlights are similar to those of many current Cadillacs, including the recently refreshed XTS sedan. The main part of the lamp starts high up and is slightly horizontal like the Escala concept, but they extend over the fenders and a strip of LEDs descends down the front. A previous report noted the XT4 will be built in Kansas on the Chevy Malibu platform. That means it will be a front-drive-based vehicle likely offering both front- and all-wheel-drive. Under the hood will probably be at least one turbocharged four-cylinder engine, with a second, more powerful upgrade option a possibility. We expect to see the fully revealed model to show up by the end of 2018. Related Video: Featured Gallery Cadillac XT4 spy shots View 15 Photos Image Credit: Brian Williams Spy Photos Cadillac Crossover SUV Luxury cadillac xt4 cadillac xt3

Cadillac Super Cruise wins the 2019 Autoblog Technology of the Year Award

Autoblog's 2019 Technology of the Year winner is Cadillac's Super Cruise. The SAE Level 2 semi-autonomous system allows for hands-free highway driving, reducing driver fatigue and improving safety. Additionally, Super Cruise packs in safeguards that force a driver to stay alert, bringing in a level of accountability not found in other Level 2 systems. Cadillac beat out Infiniti's VC Turbo technology and the EQ Boost 48-volt system from Mercedes-Benz, the other two finalists. General Motors mapped more than 130,000 miles of highways across the country, so Super Cruise always knows where you are. A camera on the steering column keeps an eye on the driver to make sure they're watching the road. Stray your gaze too long and the system forces you to take back over. Super Cruise has its limitations — it won't change lanes for you — but it is the most well-rounded and refined semi-autonomous system we've ever tested. There's no ping-pong effect as the car finds the center of the lane, and it always seems to leave a comfortable gap between you and the car ahead. Super Cruise launched in the CT6, which is ending production this year. But the sophisticated technology will migrate to other Cadillacs in 2020. The system is as easy to use as any other adaptive cruise control. Indicators in the instrument cluster and a light on the steering wheel indicate when and if the system is able to work. If you're off the defined grid, you can still use the car's regular adaptive cruise control — you just have to keep your hands on the wheel. Autoblog editors were also impressed with Cadillac's responsible approach to marketing the tech. The company doesn't even promote it as a Level 2 system, as it doesn't want to over-promise and under-deliver. Quite the opposite actually. Super Cruise simply works, and it works well. That's why it's our 2019 Technology of the Year. We'll present the award next week at the Detroit Auto Show. Come back for video of the event. Related Video: