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GM confirms 2015 Silverado, Sierra to get 8-speed automatic

When viewed alongside the next Ford F-150 and the Ram 1500, there is one thing that seems to be missing from the Chevrolet Silverado and GMC Sierra. Where the F-150 will rely on turbocharging and aluminum architecture and the Ram sports an eight-speed automatic and an air suspension, the General Motors twins lack a big, calling-card feature. They're very good, very refined trucks, but one could argue that they're not terribly innovative.
And while it might not be as flashy a feature as air suspension or a lightweight skin, the Silverado and Sierra will get their own eight-speed automatic for 2015, a transmission that will be paired with the company's Ecotec3 6.2-liter V8. The new cogswapper will also find its way into the GMC Yukon Denali, but for now, there's no indication why the Cadillac Escalade, Suburban, Tahoe and standard Yukon are being left out.
According to GM, the new gearbox is about the same size and weight as the current Hydra-Matic 6L80 six-speed. By the time the new powertrain combination enters production late this year, the EPA will almost certainly have gotten around to certifying the vehicles' fuel efficiency. Until then, feel free to speculate. The current Silverado with the 6.2 and six-speed auto returns 14 miles per gallon in the city and 20 on the highway. How much do you think the eight-speed will improve those figures? Scroll down for the official press blast from General Motors, and then head into Comments.

GM pauses 3.0-liter turbodiesel production due to a supplier shortage

General Motors confirmed it has temporarily stopped taking orders for trucks and SUVs equipped with the 3.0-liter Duramax turbodiesel six-cylinder engine. It blamed the last-minute pause on a supplier-related shortage. Website TFL Truck first reported the news, and a representative from General Motors quickly confirmed it. The spokesperson explained the issue is due to a "temporary part shortage" and added that production will resume "as soon as possible," meaning the Duramax engine (which is called LM2 internally) is not going away permanently. Additional details are not available, so we don't know if the issue is related to the ongoing chip shortage. Rather than delay deliveries and create a backlog, General Motors is reportedly asking its dealers to encourage buyers who want a turbodiesel engine to instead select either the 5.3-liter V8 or the 6.2-liter V8, depending on the model selected. Both are gasoline-powered units. There's no word yet on when Duramax production will resume. The shortage affects several models, including Chevrolet's Tahoe, Suburban, and Silverado 1500 and GMC's variants of these trucks. Cadillac's Escalade is temporarily diesel-less as well. Heavy Duty variants of the Silverado and the Sierra are not affected because they're powered by a different Duramax engine with eight cylinders. Motorists seeking a full-size SUV powered by an efficient turbodiesel engine are temporarily out of options because the Tahoe/Yukon and the Suburban/Yukon XL had the segment to themselves. The Duramax was surprisingly popular, too: in May 2021, GM Authority reported that the turbodiesel straight-six represented 8% of Suburban sales and 6% of Tahoe sales. Installed in a rear-wheel-drive Tahoe, the engine returns 21 mpg in the city, 28 mpg on the highway, and 24 mpg in a combined cycle, figures that make the body-on-frame behemoth more efficient than the unibody, front-wheel-drive Chevrolet Blazer that's 20 inches shorter and approximately 1,700 pounds lighter. Related video: 2021 Chevrolet Tahoe 3.0L Duramax engine

Chevrolet Suburban Luggage Test: How much fits behind the third row?

From the very beginning of doing these luggage tests, I specifically had no intention of doing one for the Chevy Suburban or any extended-length full-size SUVs. Quite simply, there was no question that my six suitcases were going to fit behind the third row. And not only that, I was pretty confident there'd be a ton of space left over, much as there is in mid- and full-size two-row SUVs.  And yet, you know what vehicle I've received more requests for cargo-related information about over the years? That's right, the Chevrolet Suburban. Sure, it's not exactly BTS fan mail volumes, but it's more than anything else. Apparently, people want to know how much fits in the back of a Suburban (or GMC Yukon XL ... or Cadillac Escalade ESV). So, when a Suburban popped up in the press fleet I decided to finally give the people what they want.  As a reminder, this is the amount of cargo space behind the THIRD row of a Suburban. Chevrolet says this is 41.5 cubic feet, and it sure looks like it.  For the record, the most stuff I've ever put into the back of a three-row vehicle is a Honda Odyssey, which has 32.8 cubic feet of space. I never did another minivan after that, for reasons effectively described above. And no one has asked for it. Now, because I'm greedy, I lifted up the floor to see if there's any underfloor space. Wow, there is! Theoretically, it could lower the floor a bit and allow for even more stuff, but the floor's hinges don't allow it. Unlike those in a BMW that can be propped into an upright position, these'll just drop the floor back down again. That's OK, I won't use this then. Let's get to the bags. As with every Luggage Test, I use two midsize roller suitcases that would need to be checked in at the airport (26 inches long, 16 wide, 11 deep), two black roll-aboard suitcases that just barely fit in the overhead (24L x 15W x 10D), and one smaller green 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). So yeah, it all fits. No surprise there. In fact, there's even more room leftover than I anticipated.  Let's go to the extra (and imaginary) items, then! First up, the trusty 38-quart Coleman cooler. This added to my bags, plus maybe a duffle bag, is what big "compact" SUVs like the Kia Sportage and Toyota RAV4 can manage.