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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 reports third straight sales drop in China in 2020

BEIJING — General Motors' vehicle sales in China fell 6.2% in 2020, as the U.S. automaker suffered a prolonged slowdown in the world's biggest auto market. GM, China's second biggest foreign automaker, delivered 2.9 million vehicles in the country last year, the company said on Wednesday, for a third straight decline in annual sales. But sales have been recovering in the second half of last year, up 12% between July and September and 14% in the final three months. GM has a Shanghai-based joint venture with SAIC Motor, in which the Buick, Chevrolet and Cadillac vehicle brands are made. It also has another Liuzhou-based venture, with SAIC and Guangxi Automobile Group, in which they make no-frills minivans and have started to make higher-end cars. Sales of its Buick brand grew 4% on the year and Wuling rose 9%, the statement said. Luxury brand Cadillac's sales increased 8%. Sales of GM's more affordable Baojun brand dropped 33% last year, while sales of its mass-market Chevrolet tumbled 30%. GM's delivery of 2.9 million vehicles in China follows 3.09 million vehicles in 2019, 3.65 million vehicles in 2018, and 4.04 million in 2017, for a three-year decrease of 28%.

Jeff Gordon will come out of retirement to race new Cadillac endurance racecar

Jeff Gordon is not a man who takes well to retirement, apparently. That's not a surprise at all, given that we've been talking about his return to racing since almost the minute he retired in the first place. This year, he's taken the wheel for Dale Earnhardt, Jr., who is recovering from a concussion, several times already. So we shouldn't be too surprised to find out he's officially coming out of retirement – the twist is that it won't be in a stock car. Gordon has signed onto Wayne Taylor Racing, Motorsport.com reports, and he'll join Ricky and Jordan Taylor as well as Max Angelelli. Their ride will be the newly-revealed Cadillac DPi-V.R racer, a Dallara-chassis car powered by a 6.2-liter pushrod V8 loosely related, Cadillac claims, to the engine in the current CTS-V. You can read all about the DPi-V.R right over here. Remember, Gordon has a total of 93 NASCAR wins to his name, as well as four titles. He knows his way around Daytona pretty well, too, having won the 500 three times. He's also dabbled in endurance racing once before, in the 2007 24 Hours of Daytona with Taylor, Angelelli and Jan Magnussen in a WTR Riley-Pontiac car. They ended up on the podium, so you can say Gordon's inaugural and only outing in endurance racing so far was a success. It's been a decade, so we'll see if he's rusty, although knowing about how competitive champions are, we think he'll blow out the cobwebs and get right down to work. You can read Gordon's statement over at his personal site. Related Video: