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GM exploring ways to raise half-ton Duramax diesel tow rating

Lots of truck owners cheered when GM announced fuel economy numbers for the 2020 Chevrolet Silverado with the 3.0-liter Duramax diesel inline-six. Even after Ram let loose its EPA mileage ratings for the 2020 Ram 1500 EcoDiesel, the Chevy oil-burner still took the trophy. The victory was years in the making, GM engineers spending an entire four-year development cycle refining the LM2 Duramax to increase mileage. The tradeoff, as well all know by now, is towing; the Duramax in half-ton duty pulls a maximum 9,300 pounds in the Silverado. Rivals across town can do more, the Ford F-150 PowerStroke rated at 11,500, the Ram 1500 EcoDiesel game to pull 12,560. GM engineer John Barta told Muscle Cars & Trucks that more hauling chops could be on the way, explaining, "We’re actually looking at upgrading some of the materials around (the engine bay) to see if we can maybe raise our tow rating." Engine bay materials are at issue due to thermal complexities underhood. John Barta, GM's assistant chief engineer of diesel engine controls, said the Duramax's inline-six configuration allowed engineers to get emissions hardware like the combined selective catalytic reduction, diesel oxidation catalysts, and diesel particulate filter unit closer to the engine, where it heats up quicker, getting emissions down quicker. But that filter puts another heat source in those confines, enforcing a cap on the tow rating to keep the engine and other systems from overheating. "If you look under the hood," he said, "youÂ’ll see a significant amount of silver ‘moon tapeÂ’ around to make sure things arenÂ’t getting overheatedÂ… if we were to go up in higher towing, which we can, we start impacting the possibility of deteriorating some of the components.” There isn't much space for more grille, so swapping for a better grade of "moon tape" or a different kind of material could reduce engine bay heat, extracting a higher tow rating in the process.  It's important to note a point Barta's been making for months about the Duramax figures, though. "Even though itÂ’s nice to brag about big numbers, in reality, light duty customers are not towing that large with their trucks," and, "We do know that (95 percent) of our light duty customers donÂ’t tow over 9,000 pounds." On our First Drive of the 2020 Silverado diesel we called out the tow rating, but emphasized that the Chevy and GMC have more important challenges to overcome.

GMC Hummer EV SUV to be fully revealed during Final Four in April

GMC is going to use another large platform to reveal the next chapter in its Hummer story. The GMC Hummer EV SUV will officially be revealed on Saturday, April 3, at 5 p.m. ET during the Final Four. That’s the SUV, not the truck, which has already been revealed. YouÂ’ll be allowed to place a reservation for the SUV at the same time as itÂ’s unveiled during the basketball games. There are no further details about the SUV, but weÂ’ll point out that a decent preview of what the SUV will look like is already out and can be seen here. ItÂ’s going to look a whole lot like the pickup, but will of course be fully boxed in, as an SUV is. WeÂ’ll know more about what GMC has in store in just under a monthÂ’s time.  In addition to the news about the impending SUV, GMC released video footage of the pickup version undergoing winter testing in MichiganÂ’s snowy Upper Peninsula. You can see the video below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. GM says that itÂ’s using this region to dial in and calibrate the truckÂ’s all-wheel-drive torque distribution, traction control system and stability control. Testing is conducted on snow, ice, and steep and split-friction grades. ThatÂ’s all GM is letting us in on for now, but at least we have the second version of the electric Hummer in our scopes now and will be eagerly anticipating its reveal. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Mazda CX-50, GMC Hummer EV and Porsche Macan T | Autoblog Podcast #724

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor James Riswick and News Editor Joel Stocksdale. It's a big week for interesting car reviews, as we discuss driving the Mazda CX-50, GMC Hummer EV, Porsche Macan T and Toyota GR86 (formerly known as GR 86, with a space). They also discuss the newly unveiled 2023 Toyota GR Corolla and 2023 Honda HR-V, as well as Elon Musk becoming Twitter's biggest shareholder. Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #724 Get The Podcast Apple Podcasts – Subscribe to the Autoblog Podcast in iTunes Spotify – Subscribe to the Autoblog Podcast on Spotify RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars we're driving 2023 Mazda CX-50 2022 GMC Hummer EV Edition 1 2023 Porsche Macan T 2022 Toyota GR86 2023 Toyota GR Corolla revealed: Looks ferocious, packs 300 hp 2023 Honda HR-V revealed, is now Civic-based and bigger Elon Musk takes 9.2% stake in Twitter, is now biggest shareholder Feedback Email – Podcast@Autoblog.com Review the show on Apple Podcasts Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.