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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:    

Kid Rock's Chevy Silverado is a working-class hero [w/video]

Rock stars are known for their swagger, and Kid Rock brings a mountain of that confidence to his design for this chrome-festooned 2016 Silverado 3500HD at the SEMA show. Inspired by his song Born Free and a visit to the pickup factory in Flint, MI, the styling is meant to celebrate the folks that build these trucks everyday. The Silverado sparkles like a beacon under the lights at the SEMA Show thanks to its black metallic-flecked paint and acres of chrome. The shiny stuff covers the custom grille, exhaust stacks, 22-inch wheels, and side steps. In a patriotic nod, silver Stars and Stripes run down the side to offer a little contrast to the dark body. Further emphasizing the pickup's huge size, a trailer carries a pair of Gibbs Sports Quadskis that are decorated to match the truck. Kid Rock takes inspiration from – get this – acid-wash jeans for the interior by combining Sky Cool Gray leather seats with metallic-looking inserts. Appropriate for a musician, there's also a custom Kicker stereo in there, and Made in Detroit logos adorn the door sills and glovebox. Related Video: Show full PR text SILVERADO 3500HD KID ROCK CONCEPT CELEBRATES FREEDOM Boldly styled custom 'dually' truck honors working-class Americans LAS VEGAS – Inspired by his hit song "Born Free," musician Kid Rock collaborated with Chevrolet to design a customized 2016 Silverado 3500HD "dually" that celebrates freedom and honors American workers. The truck was introduced today at the SEMA Show in Las Vegas, where it joined other personalized Chevy truck concepts designed to showcase the depth and breadth of the brand's pickup truck lineup. Michigan-born Kid Rock visited the Silverado HD assembly plant in Flint, Mich., to meet with the members of UAW Local 598, who built the truck, before driving it to Chevrolet's design studio to share his ideas for its customization. "The Flint plant – and everyone on the line – is the backbone of America," said Kid Rock. "I wanted the design for the truck to be bold, but with features and elements that wouldn't be out of reach for working-class guys." As a result, his Silverado features several enhancements, including a custom chrome grille with the Born Free logo and an enlarged Chevy Bowtie emblem, chrome exhaust stacks and patriotic graphics that flow across the body sides. A unique execution of the patriotic motif was an idea he expressed at the start of the project.

Chevy Bolt, GM's 200-mile EV, could debut in Detroit

It's not news that General Motors is working on a $30,000 electric vehicle with a 200-mile range. Then-CEO Dan Akerson said as much back in 2013. What we've heard before is that this mystery EV will be based on the Chevrolet Sonic and will will arrive in 2017. So, if that's all correct, then it would make sense that confirmation of this plan would come at the 2015 Detroit Auto Show, which is just around the corner. And lookee here... The Wall Street Journal is reporting that GM will unveil a concept Chevy Bolt at the Detroit show on Monday. That name sure makes sense, too, since GM registered that trademark back in August. According to the Journal, the rumored numbers – 200-mile range, $30,000 price – are still what's expected. Some new purported details are that the battery will come from LG Chem, which also makes the Volt's batteries, and that the Bolt will be a crossover that could be sold around the world. This all smacks of a preemptive strike against the Tesla Model 3, which is also due around 2017. Currently, GM sells the Spark EV in limited areas of the US, despite a lot of excitement for wider availability. To sell a 200-mile EV for $30,000 means that GM and LG Chem will likely have drastically reduced the cost of making a big plug-in vehicle battery. What this means for the new Volt and GM's future plans is something we're more than a little excited about to learn more of on Monday, the same day that we get to see the redesigned Chevy Volt for the first time. Well, aside from the CES teaser. Green Chevrolet Crossover Electric 2015 Detroit Auto Show Chevy Bolt bolt