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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.

Another Green Episode | Autoblog Podcast #665

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor, Green, John Beltz Snyder and West Coast Editor James Riswick for an episode dedicated to electric cars. First, they talk about what they've been driving, including the Ford Mustang Mach-E, the new base, rear-wheel-drive Porsche Taycan as well as the Polestar 2. Then they dive into some green news, including the reveal of the Audi E-Tron GT, the new Chevrolet Bolt EV and Bolt EUV and plans to go electric by companies like General Motors and Jaguar Land Rover. Autoblog Podcast #665 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown What we're driving:Ford Mustang Mach-E Porsche Taycan Polestar 2  News 2022 Audi E-Tron GT revealed as sporty, electric cousin to Porsche Taycan 2022 Chevrolet Bolt EUV introduced along with revised Bolt EV General Motors sets goal of being carbon neutral, largely electric by 2035 Jaguar to sell all-electric cars by 2030, and six electric Land Rovers coming in next five years Feedback Email – Podcast@Autoblog.com Review the show on iTunes 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:

2016 Chevy Camaro teased as current-gen car prepares to hit 500k sales

Just as Chevrolet prepares to launch the sixth-generation Camaro, the current, fifth-generation car is about to hit a major milestone: 500,000 units sold in the United States. That's impressive, and to celebrate, Chevy has released this video, showing the Camaro Z/28 doing what it does best around a race track. But that's not all there is to see in this video. At the end, Chevy gives us a glimpse at the sixth-generation Camaro, expected to debut in the not-too-distant future. Have a look, and check out Chevy's press blast, below, for more details about the 500k sales mark. Related Video: Fifth-gen Camaro Approaches 500,000 U.S. Sales Production milestone caps five years as America's best-selling performance car DETROIT – Talk about a big family: Chevrolet expects to deliver the 500,000th fifth-generation Camaro in the United States this month. The fifth-generation Camaro has been a runaway success for Chevrolet since it went on sale in August 2009. Camaro sales passed Mustang in 2010, to become America's best-selling performance car – a title Camaro has retained for five consecutive years. In the process, the Camaro has helped bring new buyers to Chevrolet – with 63 percent of retail buyers new to GM. "The fifth-generation Camaro has clearly resonated with both long-time Camaro fans, and first time performance-car buyers," said Todd Christensen, Camaro marketing manager. "That sets the bar high for the next chapter of the car's history." Remarkably, the Camaro continues to gain momentum, even as the fifth-generation Camaro nears the end of production this year. In 2014, Camaro total sales increased 7.1 percent for its second-best year of sales since its introduction.