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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.

Pushing Back: GM expanding Chevrolet into Korea, Daewoo out

Chevrolet Camaro goes to South Korea - Click above for high-res image
General Motors decided several years ago to begin heavily promoting Chevrolet as its global mainstream brand even in markets where its existing brands like Opel and Daewoo were a dominant force. Today, at the Busan Motor Show in South Korea, GM Daewoo president Mike Arcamone announced that the Camaro would lead the way in GM's efforts to market Chevrolet in South Korea.
For now at least Chevrolet and Daewoo-branded vehicles will coexist in the Korean market. However, while we were in China last week GM officials told us that the Daewoo brand, which has been somewhat tainted by past quality issues, would eventually be phased out in favor of Chevrolet. When the new Aveo launches next year it will likely be badged as a Chevrolet even though GM Daewoo is in charge of engineering the car.

GM recalls select Chevy Cruze, Sonic and Buick Verano models over airbag issue

General Motors is recalling certain 2012 Buick Verano, Chevrolet Cruze and Sonic models due to a defect in the driver's airbag system. According to the National Highway Traffic Safety Administration, the airbag has a shorting bar which may contact two internal terminals. If that happens during a crash, the supplemental restraint may not deploy, increasing the risk of driver injury. The recall includes a total of 2,949 units.
GM will contact owners and replace the steering wheel airbag coil at no cost. At this point, it's unclear when the recall will begin, though owners may contact the automaker at 1-800-521-7300 for more information. You may also take a closer look at the full NHTSA notice below.