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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 posts $4 billion third-quarter profit thanks to trucks and SUVs

DETROIT — General Motors is posting huge third quarter numbers, pulling in $4 billion in profit over three months after losing money due to the virus outbreak. GM's adjusted earnings were $2.83 per share, easily outpacing Wall Street's per-share projections of $1.43, according to a survey by FactSet. Revenue of $35.5 billion also edged out most expectations. Shares jumped almost 6% before the opening bell Thursday. The company swung back from a $806 million loss in the second quarter, when it was restarting factories shuttered for safety during the early stages of the pandemic. The Detroit automaker joined most global automakers in reporting better-than-expected earnings from July through September as sales across the globe started to rebound from coronavirus lockdowns, especially in China. GM sales in China jumped 12% in the third quarter, with sales of its Buick and Cadillac brands both rising more than 25%. In the U.S., GMÂ’s most profitable market, sales fell 9.9% in the third quarter compared with a year ago, but were a dramatic improvement over the 34% drop in the second quarter. Sales improved sequentially each month, the automaker said, an encouraging trend. GMÂ’s profit was boosted by higher-priced pickup trucks and large SUVs, which have seen strong sales in the U.S. through the pandemic. It was the best quarter on record for GM's Chevrolet Blazer. Sales of the Cadillac XT6 spiked 45% in the U.S. over last year. Large pickups also sold well. GM also said it was pumping $2 billion into its Spring Hill, Tennessee manufacturing plant to push its transition to produce electric vehicles. Last week, crosstown rivals Fiat Chrysler and Ford reported strong third-quarter net income. FCA said it made $1.4 billion for the period, while Ford earned $2.39 billion. Related Video: Earnings/Financials Buick Cadillac Chevrolet GM GMC

2019 Cadillac XT4 vs. other compact luxury crossovers: How they compare

After years of every other luxury car maker stocking their showrooms with trendy crossovers, Cadillac is finally joining the fray. Its latest addition is the 2019 Cadillac XT4, a tidy little crossover that proudly bears signature Caddy designs such as the tall slender taillights. And based on our first drive of the car, it impresses in many ways, such as its refined engine, classy interior and excellent ride quality. View 39 Photos That's good news for the little Cadillac, but it needs to stand out in a big segment. To see if it has any other areas where it shines, or maybe some where it's a bit dim, we decided to compare its specifications with those of four of the segment's bestselling compact crossovers, the Lexus NX 300, Acura RDX, Audi Q5 and BMW X3. And for good measure, we threw in the XT4's crosstown rival, the Lincoln MKC. View 15 Photos Here's a chart showing each of these vehicles' vital stats, including horsepower, torque, fuel economy, cargo space, passenger space and price. Further analysis follows. If you'd like to compare any of these vehicles with other luxury crossovers, be sure to check out Autoblog's Car Finder and Compare tools. Also, this is solely a comparison of basic specifications, and for more in-depth information on these cars, be sure to follow the links to our full reviews. And don't be afraid to check these cars out in person at their respective dealerships. Engines, transmissions and fuel economy With the exception of the Lincoln MKC's optional 2.3-liter engine, every competitor here resorts to the same type of engine, a turbocharged 2.0-liter four-cylinder, for its propulsion. And unsurprisingly, they make similar power, in the mid-200 horsepower and mid-200 lb-ft of torque range. Of the 2.0-liter engines, the standout is the Acura RDX, which produces a hearty 272 horsepower and 280 pound-feet of torque. It's second in power only to the Lincoln's optional turbo 2.3, which makes 285 horsepower and 305 pound-feet of torque. The bottom of the pack is the Lexus with 235 horsepower and 258 pound-feet of torque, but the next least powerful crossover is the Cadillac XT4, with just two more ponies than the Lexus, and the same amount of torque. View 22 Photos Though the Cadillac is nearly the least powerful, it does get to claim the best fuel economy numbers, rated at 24 mpg in the city, 30 on the highway, and 26 combined with front-wheel drive.