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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

2022 GMC Canyon gets a few tiny changes

After overhauling the GMC Canyon lineup into Elevation Standard, Elevation, AT4, and Denali for the 2021 model year, GMC has sprinkled just a few changes on the 2022 Canyon. The midsized pickup's appearance outside and inside doesn't change. The sole alteration in the cabin is that wireless charging won't be come standard on Denali next year, but be an option. That could be GM making lemonade out of lemons, telling customers that if they want hard-to-find semiconductor chips then they're going to have to kick in more dough. The only other change is a new gloss black aluminum spare wheel for the AT4 trim when specced with a Crew Cab and a short bed. This rim replaces the steel spare wheel that remains standard fit on Elevation, Elevation Standard, and Denali. And anyone looking for the High Elevation Package will need to look for it by its new name, the Elevation Premium Package. The Denali Black Edition Package is new for next year for $2,295 on gas-powered models that aren't fitted with the Power Package or the Cat-Back Performance Exhaust. On the exterior, this adds five-inch black assist steps to replace the chrome units, black chrome exhaust tips instead of polished tips, and 20-inch low-gloss-black aluminum wheels with black GMC logo center caps. Inside come premium all-weather floor mats taking the place of the carpeted mats. The current, second-generation Canyon doesn't have long to live, with the third-generation pickup expected for the 2023 or 2024 model year. Spy shots from earlier this year make us think the Canyon and its Chevrolet Colorado twin will pick up styling to emphasize their connection to GM's larger half-ton pickups. Rumor also has it that the Silverado will donate what may be the new midsizer's only powertrain, a turbocharged four-cylinder engine — the new corporate 2.7-liter turbo in this instance. That 310-horsepower mill would supplant both the 2.5-liter four-cylinder 3.6-liter V6 gas engines now available, and the 2.8-liter Duramax diesel. It does, however, appear that GMC will get its own version of the Colorado ZR2, spy shooters catching a camouflaged, high-rise Canyon on a set of Multimatic DSSV dampers. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

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.