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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:    

Next Cadillac CTS-V confirmed for Detroit

As a car enthusiast, you should be excited for the 2015 Detroit Auto Show. Hell, we can barely contain ourselves – it's shaping up to be a great show. And this bit of news only heightens our expectations – Cadillac will be bringing its third-generation CTS-V to January's North American International Auto Show. That bit of high-performance news has been confirmed to Autoblog by Cadillac officials. In fact, we've received an official invitation to the brand's press conference, and while the latter is light on information, it does say, "it's time for the V-Series to elevate to the next level." Considering our last experience with the CTS-V, we're not sure what there is left to elevate, although we're hopeful that Caddy will come up with something. What that could be, of course, is very open to speculation. When the last CTS-V debuted in 2009, it arguably outgunned Germanic challengers like the 500-hp BMW M5 and 518-hp Mercedes-Benz E63 AMG for a lot less money, boasting a detuned version of the Chevrolet Corvette ZR1's 6.2-liter supercharged V8. Could that trend carry on, with the next CTS-V borrowing the supercharged, 650-hp mill from the new Corvette Z06? If escalation is the name of the game, the Z06 engine would seem to once again allow Caddy battle it out on firm, big-booted footing with BMW and Mercedes-Benz. Of course, all will become clear on the morning of Tuesday, January 13. Like we said, we can hardly wait. Related Video:

Online Find Of The Day: 2008 Cadillac XLR picks up where Excalibur left off

We try very, very hard to keep snark away from creations like the one you see here. After all, someone poured plenty of enthusiasm, time and money into turning a 2008 Cadillac XLR into a modern interpretation of the new-old cars typically done by cottage builders like Excalibur and Clénet. Even so, it's hard not to wince when you set an eye on this machine. With its wheelbase stretched to accommodate the extra bodywork, goofy sidewalls and upkicked nose (examine it in profile, it looks slightly bent in the middle), this "neoclassic" takes whatever was loveable about the Cadillac underneath and buries it in a tacky grave.
Miraculously, the engine bay has been left unmolested, which means the retractable hardtop convertible still features a 4.6-liter Northstar V8 engine good for 320 horsepower. If only that were enough to outrun its shame. If, for some reason, you feel like taking this thing home, Harry Kaufmann Motorcars of Milwaukee says it can be yours for a paltry $74,998. We wish were joking. Check it out here.