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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.

Here are your 2016 North American Car and Truck/Utility of the Year finalists [w/polls]

The 2016 Detroit Auto Show will kick off with the announcement of the annual North American Car and Truck/Utility of the Year awards, and the three finalists in each category have just been revealed. Following this announcement, the jury – which includes Autoblog editor-in-chief Mike Austin – will re-evaluate each candidate before casting a final vote for the winner. This year's finalists are: Car of the Year Chevrolet Malibu Honda Civic Mazda MX-5 Miata Truck/Utility of the Year Honda Pilot Nissan Titan XD Volvo XC90 The 23rd annual awards will be announced on the morning of Monday, January 11. For now, we want to know where you stand. Let us know which vehicles you think should win, by voting in the polls below. Chevrolet Honda Mazda Nissan Volvo north american car of the year NACTOY

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: