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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:    

GM CEO Barra says 'we are selling every truck we can build'

DETROIT — General Motors Chief Executive Mary Barra said on Monday the automaker is "selling every truck we can build" and expanding North American truck-building capacity, even as U.S. gasoline prices hit record highs. Barra made her comments during the automaker's annual shareholder meeting. GM is pursuing a two-track strategy: Investing heavily in electric vehicles for North America, China and other markets, and funding those investments by trying to maximize profits from its North American combustion pickup truck and large SUV lineups. Barra said GM is planning higher-priced versions of its Silverado large pickup and its large SUV models. GM and its Detroit rivals Ford Motor Co and Stellantis NV rely heavily on sales of large pickup trucks and SUVs for global profits. High U.S. gasoline prices in the past have undermined consumer demand for relatively inefficient models. Nominal pump prices hit an average of above $5 a gallon for the first time ever last week, the federal government said Friday. GM is ramping up production of EVs. Barra said the Cadillac Lyriq electric sport utility is sold out through 2023. In response to shareholder questions, Barra said the "clear priority" for using cash generated by its operations is to "accelerate our EV plans." She did not rule out share buybacks or other approaches to returning cash to shareholders. GM still expects to increase production this year by 25-30%, despite continuing pressure on semiconductor supplies globally. Barra said GM is working to redesign vehicles to reduce the number of processors required by 95%. Barra serves as GM's board chair and CEO. GM shareholders overwhelmingly rejected a proposal to separate those roles.

GM extends production at Detroit factory until early 2020

General Motors Co said on Friday it had extended the production at its Detroit Hamtramck plant until January 2020, against an earlier plan to discontinue production in June this year. The No.1 U.S. automaker is revamping its operations, which include plant closures and thousands of job cuts, as it looks to boost profitability in the wake of declining U.S. auto sales. The Hamtramck plant will continue to produce the Chevrolet Impala and Cadillac CT6 sedans until early next year, the company said. "We are balancing production timing while continuing the availability of Cadillac advanced technology features currently included in the CT6-V — the Blackwing Twin-Turbo V-8 (engine) and Super Cruise (driver assistance system)," GM said. The plant has already discontinued production of the Buick LaCrosse sedan and Chevrolet Volt electric hybrid car. Detroit-based union United Auto Workers' President Gary Jones said GM's decision to continue production at the plant was a relief for the workers as well as their families. "We commend GM for today's decision and we reiterate the importance of a collective bargaining process in times like these," Jones said. Reporting by Ankit Ajmera. Related Video: