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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:    

Best Large SUVs of 2024

When it comes down to large SUVs, there's more to consider than price and just how large it is. First, it comes down to what's underneath the skin. Some are built on a truck-like body-on-frame chassis — this would be the traditional, literal definition of an "SUV." Others use car-like, unibody construction, which would make them a crossover. What really matters, though, is how you use them. For most American families, a large three-row crossover is going to be your best bet. They have loads of passenger and cargo space, and deliver superior fuel economy, handling and ride quality than those big traditional SUVs. They're cheaper, too. On the other hand, those traditional large SUVs like the Chevy Tahoe and Ford Expedition are better-suited for more heavy-duty tasks like towing. Most now have bigger third rows than big crossovers, while extended-length versions like the Chevy Suburban have way more cargo capacity behind their third rows than everything but an airport shuttle. As for luxury large SUVs, they fall into those same two categories as well, with American choices mostly being truck-based. The pros and cons of choosing one over another are similar. Below, you will find our list of the best large SUVs broken down into three categories: large family crossover, large traditional SUV and large luxury SUVs, which comprise both construction types.  Best Large Family Crossovers  |  Best Large Traditional SUVs  |  Best Large Luxury SUVs Best Large Family Crossovers 2024 Honda Pilot Why it stands out: Exceptional storage and cargo space; unique second-row functionality; refined ride; versatile and capable TrailSport; advanced AWDCould be better: Subpar acceleration with lackadaisical transmission and engine response; so-so driver assistance tech Read our full 2024 Honda Pilot Review The Honda Pilot was completely redesigned for 2023. It maintains its predecessor's family-friendly packaging and overall focus, but it has injected a welcome sense of style (especially in the TrailSport pictured above) that makes it stand out much better from the big crossover crowd. The Pilot's restrained adornment and classic proportions are refreshing compared to the increasingly busy Kia Telluride, Hyundai Palisade and Subaru Ascent. Let's talk about practicality, though, which is ultimately the Pilot's best attribute.

Silverados, Raptors and a 710 horsepower McLaren | Autoblog Podcast #542

On this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Associate Editor Joel Stocksdale. We talk about driving the new engines in the upcoming 2019 Chevy Silverado, updates to the Ford F-150 Raptor and a purple McLaren 720S that briefly passed through our office. As always, we also help a listener buy a new car in our "Spend My Money" segment. Autoblog Podcast #542 Your browser does not support the audio element. Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars we've been driving: Chevy Silverado, McLaren 720S Ford F-150 Raptor Updates Best food for road trips Spend my money Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: Podcasts Chevrolet Ford McLaren Truck Coupe Performance Supercars ford f-150 raptor mclaren 720s