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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 to invest $632 million in Indiana plant for future pickup truck production

General Motors plans to invest $632 million in its Fort Wayne, Indiana, assembly facility to prepare the plant for future internal combustion engine full-size light duty trucks, it said on Monday. The investment will be used to support new conveyors, tooling and equipment for the plant that manufactures GM's Chevrolet Silverado 1500 and GMC Sierra 1500 trucks. GM has detailed more than $2.3 billion in planned investment in a series of announcements since last week as it works to retool existing North American auto plants and introduce more efficient next-generation internal-combustion full-size trucks and SUVs. Another investment announcement is planned later this week. The largest U.S. automaker is continuing to make big investments in gas-powered vehicles even as it vows to stop building them in 2035. Last week, GM said it was investing more than $500 million in its Arlington, Texas, assembly plant to prepare it for production of internal combustion engine full-size SUVs. GM faces increasingly stringent emissions requirements from California and the Environmental Protection Agency (EPA). Last week, GM also said it plans to invest more than $1 billion to re-tool two manufacturing sites in Flint, Michigan, to prepare for a new generation of its heavy-duty trucks. The Texas announcement highlights the company's commitment to continue "providing customers with a strong portfolio of (internal combustion) vehicles for years to come," GM said last week. On Tuesday, GM said it would invest C$280 million ($210 million) in its Canadian Oshawa Assembly to produce the next-generation internal combustion engine full-size trucks. GM paid $128.2 million in fines for failing to meet Corporate Average Fuel Economy (CAFE) program requirements for 2016 and 2017, records released recently show. The EPA in April proposed requiring a 56% reduction in projected fleet average emissions over 2026 requirements. (Reporting by David Sherpardson in Washington and Shivansh Tiwary in Bengaluru; Editing by Shilpi Majumdar and Conor Humphries) Plants/Manufacturing Chevrolet GM GMC

New recall issued in 2019 Chevy Silverado and GMC Sierra brake software saga

General Motors (GM) has issued a new recall for select 2019 Chevy Silverado 1500 and GMC Sierra 1500 pickup trucks that aims to resolve a faulty fix for a previous recall. According to National Highway Traffic Safety Administration (NHTSA) campaign No. 20V055000, a software update for the Electronic Brake Control Module (EBCM) could cause the electronic brake assist to be disabled.  The NHTSA first launched a recall for 463,995 Silverados, Sierras, and Cadillac CT6es on December 12, 2019 due to a software issue in the electronic brake control module (EBCM) that could disable the electronic stability control (ESC) and anti-lock braking system (ABS). As a response and resolution to that recall, GM began to reprogram the software in affected vehicles. GM later learned that the fix was creating a different problem. The installed software had its own error that was disabling the electronic brake assist. If customers see “Service Brake Assist” or “Service ECS" diagnostic warnings, they should park the vehicle and have it towed to a dealership, GM warns. While GM was going through the process of testing, pinpointing the issue, determining action and working with the NHTSA, safety experts have criticized Chevrolet and GMC for not reacting promptly and appropriately.  According to the recall, 148,055 are now affected, all of which do not meet the standards of Federal Motor Vehicle Safety Standard (FMVSS) number 126, "Electronic Stability Control" and 135, "Light Vehicle Brake Systems." To fix the braking issue, GM will once again reprogram the software. GM began notifying owners of the recall on February 10, 2020. Related Video: