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Cadillac CT4 Luggage Test | How much fits in the trunk?

If you go by exterior specs, the Cadillac CT4 is more similar to a BMW 3 Series or Mercedes C-Class. However, if you go by interior space (or price), it's more like a Mercedes A-Class or BMW 2 Series Gran Coupe. That's definitely true of the trunk, which measures a rinky-dink 10.9 cubic feet, according to GM's specs. That number is what you'd expect in a small luxury coupe rather than a sedan. Indeed, the old ATS Coupe had 10.4 cubic feet.  Nevertheless, the CT4 is somehow not the smallest in the segment. That would be the A-Class and its 8.9-cubic-foot trunk. Good grief. Now, Mercedes has been known to shortchange its cargo capacity numbers so we'll have to luggage test that at some point to know for sure. Today, let's see if the CT4 is in keeping with that 10.9 number. Also, how much worse is it than the also rinky-dink CT5 trunk or the overly optimistic 2 Series Gran Coupe? Yep, that looks pretty small. Also, note the weird rail-like things that hampered the CT5 (below right) are also present here in the CT4 (below left). There's also a similar lip to clear for the folding back seat, but the CT4's opening seems bigger.  As in every luggage test I do, I use two midsize roller suitcases that would need to be checked in at the airport (26 inches long, 16 wide, 11 deep), two roll-aboard suitcases that just barely fit in the overhead (24L x 15W x 10D), and one smaller roll-aboard that fits easily (23L x 15W x 10D). I also include my wife's fancy overnight bag just to spruce things up a bit (21L x 12W x 12D). All but the biggest bag fit, which is exactly the same number that could fit in the CT5. As the below photo shows, the bigger car has just a bit more space left over. Maybe for a pair of grocery bags. That would be consistent with the difference in cubic feet: 11.9 cubic feet versus 10.9. What about the BMW 2 Series Gran Coupe? BMW says it has 15.1 cubic feet of space, but it doesn't. At least not using the same measurement criteria that the vast majority of other manufacturers use. It can carry the biggest bag, but it would still need to leave the fancy bag behind. That's also while utilizing the 2 GC's ample under-floor storage compartment.  As such, the CT4 does indeed have a small trunk, but it's at least in keeping with its competitors. The CT5 cannot say that, regardless of which segment you compare it to.  Unfortunately for the CT4, though, the story does not stop here.

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 recalls full-size truck, SUVs and vans over faulty shifter mechanism

Twelve different General Motors vehicles from the 2013 model year, up to 54,686 units in total, are being recalled over two potential issues with their steering columns. The models in question, all full-size trucks, SUVs or vans, are the: Cadillac Escalade, Escalade ESV, Escalade EXT, Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe, and GMC Savana, Sierra, Yukon and Yukon XL.
The affected vehicles were built with a fractured parking lock cable or "a malformed steering column lock actuator gear in the lock module assembly." As a consequence, they could shift out of park without the brake pedal being applied or with the key removed or in the off position.
A bulletin from the National Highway Traffic Safety Administration indicates that the recall should begin on January 17. GM will notify owners, at which time they can take their vehicles to their dealers for repair free of charge. Have a look at the bulletin below for more information.