2008 Cadillac Srx Awd 4dr V6 on 2040-cars

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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:    

2020 Cadillac CT6 losing the 3.0-liter TT V6?

In April we learned Cadillac would no longer offer the 2.0-liter four-cylinder on the CT6. The same day we heard the news, the CT6 configurator showed that engine option gone, leaving three engines on the menu. That menu could lose another option come 2020, according to a report in AutoVerdict. The site says it got an order guide for the 2020 CT6, and the 3.0-liter twin-turbo V6 won't make it to the new year. That engine was once the top-tier choice, since eclipsed by the detuned 4.2-liter twin-turbo Blackwing V8 imminently available on the Platinum trim. AutoVerdict also read in the order guide that the horsepower figures haven't been finalized for next year's model. As it stands, the entry-level 3.6-liter six-cylinder makes 335 horsepower and 284 pound-feet of torque, the 3.0-liter twin-turbo V6 produces 404 hp and 400 lb-ft, and the 4.2-liter V8 ginning up 500 hp and 574 lb-ft when it arrives. Retiring the middle option ostensibly puts a big ol' gap in output and pricing between the two models left. Right now $24,200 separates the entry-level Premium Luxury from the Platinum. However, since the present Platinum uses the 3.0-liter, it's safe to guess that the 4.2-liter V8 will cost more, creating a larger gap. The Sport model in between uses the 3.0-liter, too. Perhaps that goes away, or maybe it stays and gets further cosmetic upgrades to give it more edge and a higher price. Another change coming to the 2020 CT6 is its induction into Cadillac's metric-unit torque-based badging system. This, remember, converts pound-foot torque into Newton-meters, then rounds up to the nearest 50. That means the 3.0-liter V6 will wear a 400 badge, the 4.2-liter V8 gets an 800T badge - the T standing for turbo. The year's been full of engine rationalizations at General Motors. Theories about the CT6 dropping the 2.0-liter figured it might have been about making space above the CT5, or guaranteeing supply for other GM models that use the engine, like the Cadillac XT4. The folks at AutoVerdict suspect the 3.0-liter TTV6 could be making the move to the CT5, and to the hot-headed CT4-V we'll be getting a look at come the end of this month. Related Video:

11 vehicles from Barrett-Jackson Las Vegas worth watching

This weekend will see the world's collector car crowds descend on Las Vegas, NV for one of the biggest shows on Barrett-Jackson's popular auction circuit. There are hundreds of vehicles up for bidding, ranging from a brand-new Lamborghini Aventador to a spattering of Art Deco classics and a huge swath of classic muscle cars.
While it's virtually impossible to assemble an inarguable list of the best cars coming during the three-day, 700-plus vehicle auction, we've sifted through the listings for this year's show - it was a tough assignment, we promise - and assembled a list of what we think will be some of the most interesting lots. We'll admit, it's a bit heavy on American iron, but if you browse BJ's listings, you'll come to a similar conclusion. Still, scroll down for our list of what we think will be the most interesting vehicles at the upcoming auction.