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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.

Woodward Dream Cruise Photo Gallery | Classics and American muscle

The 2022 running of the Woodward Dream Cruise just went down, and we were there from morning to evening drinking in the sweet sights and pre-emissions exhaust fumes. Yes, it’s a little smelly on Woodward Ave. this time of year. Just like always, the Dream Cruise invites all comers to cruise their machines on Woodward from Ferndale, MI to Pontiac, MI. Everybody is invited, but the original intent of the Dream Cruise was to highlight classic American muscle cars. YouÂ’ll see plenty of those in our mega gallery above, but weÂ’ve sprinkled it with a bunch of other vehicle types, such as modern muscle and other intriguing American vehicles. Similar to years past, though, sometimes the classics arenÂ’t the most entertaining thing to look at on Woodward. ThatÂ’s why weÂ’ll have other mega galleries coming soon, highlighting the weird cars and (great) dogs of the Cruise, all the imports and exotics you can imagine and a special one for all the trucks of Woodward — perhaps even more so than in years past, the truck population on Dream Cruise day was quite high. Click through above to see all the classics you wouldÂ’ve seen had you been roadside on the day of the cruise. And if you missed this yearÂ’s event, make sure you check out what happens next year. You wonÂ’t be alone, as itÂ’s estimated that over 1 million people attend the Dream Cruise to either watch from the side of the road or to sit in the most glorious traffic jam in the world. Related video Featured Gallery 2022 Woodward Dream Cruise classics and American muscle View 160 Photos Design/Style Buick Cadillac Chevrolet Chrysler Dodge Ford GM GMC Hummer Jeep Pontiac RAM Classics Woodward Dream Cruise

Canada opens probe into 250,000 GM pickups, SUVs over brake performance

Transport Canada, the auto safety regulator, has opened a probe into braking issues in nearly 250,000 General Motors full-size pickups and SUVs after U.S. officials launched a similar probe last year, the agency said on its website. The U.S. National Highway Traffic Safety Administration (NHTSA) in November into 2.73 million U.S. 2014-2016 model year SUVs and pickups after receiving 487 reports of hard brake pedal effort accompanied by extended stopping distance that were attributed to deterioration of the engine-driven brake assist vacuum pump. Transport Canada's probe covers 249,700 2015 through 2017 model year vehicles including the Cadillac Escalade, Chevrolet Suburban, Chevrolet Tahoe and GMC Yukon as well as 2014-2017 Chevrolet Silverado LD and GMC Sierra LD vehicles. The U.S. agency said it had reports of nine incidents of vehicles incurring damage as a result of colliding with another vehicle or fixed object at low speeds and reports of two injuries. NHTSA said if the pump fails to operate, the amount of brake power assist can be significantly reduced, extending vehicle stopping distance. The NHTSA sent GM an information request in a Feb. 7 letter. A GM spokesman said he had no update on the investigation. Reporting by David Shepardson; editing by Jonathan Oatis