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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 resumes production of its 3.0-liter turbodiesel straight-six

General Motors temporarily stopped taking orders for trucks and SUVs equipped with the 3.0-liter Duramax turbodiesel six-cylinder engine in August 2021 due to a supplier shortage. Reports claimed the pause would last through 2021, but the engine is already back in production. Enthusiast website GM Authority learned from sources inside General Motors that the straight-six is once again coming off the assembly line at the Flint Engine Plant in Flint, Michigan. There's no official word on precisely what the problem was linked to and whether it was related to the on-going chip shortage that's wreaking havoc across the automotive industry. All we know is that the pause lasted for about two weeks. Called LM2 internally, the six is available in Chevrolet's Tahoe, Suburban, and Silverado 1500 and in GMC's version of these trucks. It's also an option in the Cadillac Escalade. It develops 277 horsepower at 3,750 rpm and a V8-like 460 pound-feet of torque at 1,500 rpm in every application, and it allows these big behemoths to post surprising fuel economy numbers. Fitted to a rear-wheel-drive Tahoe, the Duramax returns 21 mpg in the city, 28 mpg on the highway, and 24 mpg in a combined cycle, figures that make it more efficient than a Blazer. Demand for the diesel-powered trucks is relatively high. While the shortage undoubtedly took a toll on sales, the Duramax represented 8% of Suburban sales and 6% of Tahoe sales in May 2021. There are no other diesel-burning full-size SUVs available new so they have the market to themselves. On the truck side, Ram still makes the EcoDiesel available on some 1500 trims but Ford abandoned the segment. Related Video: Featured Gallery 2021 Chevrolet Tahoe RST View 24 Photos Chevrolet GMC Truck SUV Diesel Vehicles

Autoblog's Editors' Picks: Our complete list of the best new vehicles

It's not easy to earn an “EditorsÂ’ Picks” at Autoblog as part of the rating and review process that every new vehicle goes through. Our editors have been at it a long time, which means weÂ’ve driven and reviewed virtually every new car you can go buy on the dealer lot. There are disagreements, of course, and all vehicles have their strengths and weaknesses, but this list features what we think are the best new vehicles chosen by Autoblog editors. We started this formal review process back in 2018, so there's quite of few of them now. So what does it mean to be an EditorsÂ’ Pick? In short, it means itÂ’s a car that we can highly recommend purchasing. There may be one, multiple, or even zero vehicles in any given segment that we give the green light to. What really matters is that itÂ’s a vehicle that weÂ’d tell a friend or family member to go buy if theyÂ’re considering it, because itÂ’s a very good car. The best way to use this list is is with the navigation links below. Click on a segment, and you'll quickly arrive at the top rated pickup truck or SUV, for example. Use the back button to return to these links and search in another segment, like sedans. If youÂ’ve been keeping up with our monthly series of the latest vehicles to earn EditorsÂ’ Pick status, youÂ’re likely going to be familiar with this list already. If not, welcome to the complete list that weÂ’ll be keeping updated as vehicles enter (and others perhaps exit) the good graces of our editorial team. We rate a new car — giving it a numerical score out of 10 — every time thereÂ’s a significant refresh or if it happens to be an all-new model. Any given vehicle may be impressive on a first drive, but we wait until itÂ’s in the hands of our editors to put it through the same type of testing as every other vehicle that rolls through our test fleet before giving it the EditorsÂ’ Pick badge. This ensures consistency and allows more voices to be heard on each individual model. And just so you donÂ’t think weÂ’ve skipped trims or variants of a model, we hand out the EditorsÂ’ Pick based on the overarching model to keep things consistent. So, when you read that the 3 Series is an EditorsÂ’ Pick, yes, that includes the 330i to the M3 and all the variants in between. If thereÂ’s a particular version of that car we vehemently disagree with, we make sure to call that out.