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GM recalls 55,000 trucks, SUVs for separating axles, fuel pump failures

General Motors issued four separate recalls covering eight of its truck and SUV models for issues related to fuel pump and half-shaft failure. In total, the four campaigns include more than 55,000 vehicles spread out over three brands and six model years, but they've sorted themselves neatly into two categories. Let's dive in.  Axle separation Four models are being recalled for potential axle separation: The 2023 Cadillac XT5, 2023 GMC Acadia, 2023 Chevy Blazer and 2023 Chevy Traverse. The number of units affected is incredibly small (10 units each times two recalls, for a total potential population of just 20 cars). In each case, a small number left the factory with half-shaft assemblies that may have been missing the retention rings that keep them in place, possibly allowing the axles to separate or eject from the transmission. In the case of the XT5 and Acadia, it's the right-side axle assembly; Chevy dealers, however, will have to check the left side.  Fuel pump failure Again, we have multiple vehicles being recalled for similar issues, but in this case they're a bit more distinct. The first of these recalls covers the 2021-2022 Chevy Equinox and 2022 GMC Terrain. GM says a supplier-initiated change may have led to fuel pumps shipping with inadequate clearances to allow for the prescribed flow of fuel, meaning the pump could starve the engine. Customers experiencing the issue may see a check engine light and experience engine hesitation. In some cases, the cars may not start at all. Chevy and GMC will replace the units in question with correctly specified pumps.  The second recall covers a fairly specific cross-section of GM's HD truck lines. 2017-2019 Silverado and Sierra HD trucks sold with the diesel engine and a dual-tank configuration may have shipped with a rear fuel pump that is susceptible to fouling by debris, preventing fuel from properly transferring to the front tank, or, in extreme cases, resulting in a collapse of the rear tank. This issue can lead to inaccurate/erratic fuel tank readings, engine hesitation, a check-engine light or failure to start.  In both cases, GM will inspect and replace faulty units free of charge for customers. Expect notifications to be delivered by March.  Related video: Recalls Cadillac Chevrolet GMC Ownership Safety Truck SUV

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:    

Weekly Recap: Lamborghini to build SUV

Finally, Lamborghini will build a sport utility vehicle. The Italian supercar maker confirmed this week that it will launch a luxury SUV in 2018. It will be built at Lamborghini's soon-to-expand factory in Sant'Agata Bolognese in Italy, and will double the company's current sales volume. Lamborghini did not announce a name for the vehicle or other details, but noted a concept version, the Urus, was displayed at the Beijing motor show in 2012. It will be sold around the world, but it's expected to be a critical offering in the United States, China, and the Middle East. The automaker projects the SUV will sell about 3,000 units per year, and it will be the third product in Lamborghini's portfolio. It currently sells the Huracan and Aventador supercars. "The introduction of a third model line endorses the stable and sustainable growth of the company and signifies for us the beginning of a new era," Lamborghini chief executive Stephan Winkelmann said in a statement. The project is also a boon for Italy, which will get 500 new jobs in the Emilia Romagna region as Lamborghini's factory will nearly double in size. Ian Fletcher, principal analyst for IHS Automotive, said the SUV will position Lamborghini for future growth. "It could well also bring new customers to the brand [who] may find the dramatic styling of Lamborghini products appealing, but find its typical sports cars restrictive," he said. "If it is a success, the SUV could be a catalyst to Lamborghini broadening its portfolio further." OTHER NEWS & NOTES GM invests in Chevy Camaro factory General Motors is investing $175 million to upgrade its factory in Lansing, MI, to build the 2016 Chevy Camaro. The investment will pay for new tooling and equipment. The improvements include three new paint systems and two new robotic framers. GM will add a second shift at the factory to build the Camaro, resulting in 500 jobs. The automaker had dropped the plant to one shift last year amid slow sales for its products, the Cadillac ATS and CTS. GM is spending $5.4 billion over the next three years to upgrade its US facilities. Last week, GM announced plans to spend $439 million to build a new paint shop for the Chevy Corvette. While the Camaro and Corvette plant improvements are intriguing to enthusiasts, GM also confirmed this week that it is investing $1.2 billion in its Fort Wayne (IN) factory that builds trucks.