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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.

Rolls-Royce Cullinan, Mercedes-AMG E 53 and BMW 2 Series | Autoblog Podcast #734

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore and Senior Editor, Consumer, Jeremy Korzeniewski kick things off with a discussion of the Rolls-Royce Cullinan and the future of the brand. The Mercedes-AMG E-Class is next up, followed by the BMW 2 Series Coupe.  Next, Senior West Coast Editor James Riswick reports from the ground at the first drive of the latest Honda HR-V. Our hosts revisit the week's news, including automakers requesting a lift of the EV federal tax credit cap, Chevy giving us a peek at its electric Blazer, and Ford recalling millions of vehicles, including about half of all the Mustang Mach-E EVs it has sold. Finally, our guys dig through the mailbag to help a reader decide whether to purchase a Ford Focus ST or another hot hatch. Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #734 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 Rolls-Royce Cullinan Mercedes-AMG E 53 BMW 2 Series Coupe Dispatch from the 2023 Honda HR-V first drive event GM, Ford, Toyota, Stellantis CEOs want EV tax credit cap lifted 2024 Chevy Blazer EV partly revealed, details coming in July Ford recalls Mustang Mach-E, includes stop-sale order Ford recalls 3 million other vehicles Spend my money 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:

Which of these five plug-ins should win the 2017 Green Car of the Year?

It's going to be a competitive race for the 2017 Green Car Of The Year. With a minivan in the running for the first time in ages, the five finalists announced by Green Car Journal today include five very different plug-in vehicles. As Ron Cogan, the editor and publisher of Green Car Journal, said in a statement, "electrification is now considered by most automakers an essential technology for current and future high-efficiency models." Let's check out the list: Toyota Prius Prime, the updated plug-in version of the world's best-selling hybrid. Chevy Bolt, GM's all-new entry into the long-range EV game. Chrysler Pacifica, a family hauler with the ability to go 30 miles on electric power. Kia Optima. The nomination is for the full line-up, but really the hybrid and plug-in hybrid models are the green stars here. BMW 330e iPerformance, one of the automaker's many new plug-in hybrids that bring battery power to models outside the i sub-brand. Green Car Journal will announce the winners at the Los Angeles Auto Show on November 17th, along with some, "other green transportation announcements," whatever that means. Last year, the winner was the 2016 Chevy Volt, the first model to snatch up two wins. Which do you think should win this year? Related Video: News Source: Green Car JournalImage Credit: REUTERS/Kevork Djansezian Green LA Auto Show BMW Chevrolet Chrysler Kia Toyota Chevy Bolt chrysler pacifica green car of the year toyota prius prime bmw 330e