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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.

2015 Chevy Silverado, GMC Sierra recalled for steering issues

DETROIT — General Motors Co is recalling more than 1 million pickup trucks and sport utility vehicles in the United States due to issues with a temporary loss of power steering, the National Highway Traffic Safety Administration said. The recall is for 2015 models. They are: the Chevy Silverado 1500, Suburban and Tahoe, GMC Sierra 1500, Yukon and Yukon XL and Cadillac Escalade. The problem may cause difficulty steering the vehicle, especially at low speeds, increasing the risk of a crash, the auto safety regulator said in a document dated Sept. 12. The document did not highlight any reports of accidents and injuries, because of the power steering issue. GM dealers will update the power steering module software, free of charge for owners of the affected vehicles. In 2014, the No.1 U.S. automaker had recalled nearly 800,000 pickup trucks worldwide because of the same problem. GM did not immediately respond to a request for comment.Related Video:

GM invests $24 million to build more crew cab trucks in Fort Wayne

The full-size pickup truck arms race continues unabated here in the United States as Ford, General Motors and Fiat Chrysler battle back and forth for sales supremacy. The Ford F-Series of trucks continues to lead the field in sales (214,611 units sold through the first quarter of 2019), but the race for second place has been a lot more interesting to watch. That's because Ram, long a distant third in truck sales, eked its way past Chevrolet late in 2018 and has managed to hold the position so far in 2019. Don't take this to mean that sales of GM's trucks have been poor across the board. In fact, the automaker reports that sales of its four-door crew cab pickups are up 20 percent in 2019 over the same period a year ago. And that's what makes GM's announcement today so interesting. The automaker is investing $24 million into its assembly plant in Fort Wayne, Indiana to build more Chevy Silverado and GMC Sierra pickup trucks, and the focus will continue to be on crew cab models. "We are building Chevrolet and GMC crew cab pickups at record volume and mix levels to meet customer demand and the $24 million investment will allow us to build even more," said GM chief Mary Barra in a statement. "Crew cab sales have been very strong, and we are expanding customer choice with new models, more cab choices and innovative new powertrains." It's worth noting that, if crew cab sales are up 20% this year, but overall sales are down (over 15% for Silverado and around 2% for GMC), that means it's the cheaper regular cab and double cab models that are lagging. At the same time, sales of the midsize Chevy Colorado have surged 16%. And finally, if you combine sales of the Silverado and Sierra into one bucket, GM still has a comfortable lead over Ram overall. If there's a takeaway here, it's that trucks of all shapes and sizes have been, currently are and will surely remain hot in America, and automakers will continue to invest money into making sure they are able to satiate consumer demand.