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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 GMC Yukon erupts into flames during Anaheim test drive [w/video]

A 2015 GMC Yukon burst into flames while on a test drive in Anaheim, CA on Sunday after smoke filled the cabin. Residents of the neighborhood where the driver abandoned the redesigned Yukon reported hearing a series of small explosions (likely the tires, based on the video), according to a report from KTLA and The Los Angeles Times.
No one was injured in the incident, which The Times reports occurred after a possible oil or fluid leak. As you can see in the image above, the Yukon was engulfed in flames, although the Anaheim Fire Department was able to put out the blaze in about 15 minutes.
"We're very lucky that no one got hurt, and it was in an area that... was safe," Lt. Tim Schmidt of the Anaheim Police Department told KTLA reporters. "If there was any place that was going to be safe, it would be this area. It's very open. It worked out for us."

GMC Canyon AT4X rumored to get more extreme AEV Edition

When GMC debuted the new 2023 Canyon pickup in August, the midsize lineup gained the hardcore AT4X off-road trim the brand has been spreading throughout its wares. The new top-of-the-line model is GMC's version of the Chevrolet Colorado ZR2 and features the same off-road goodies, like the Multimatic DSSV suspension, unique front fascia, more skid plates, front and rear locking differentials, and a Baja drive mode turning the 33-inch tires. The Edition 1 launch model adds to the production goods by bolting on a front safari bar with a 30-inch light bar, a Comeup winch, an upgraded front skid plate, reconfigurable bed rails, front and rear underbody cameras, and special badging. The Canyon AT4X Edition 1 was gone almost immediately, because of course. However, Muscle Cars & Trucks reports that something just as special could be coming for buyers in the form of a Canyon AT4X AEV Edition. American Expeditionary Vehicles already breathed all over the last-gen Chevrolet Colorado and the current Chevy Silverado, looks like GM not only intends to keep the relationship going but expand it. MCT credits a source for news that the AEV-worked Canyon will get a snorkel and 35-inch tires. Chevrolet offered a snorkel as an aftermarket piece for the Colorado ZR2 Bison, and AEV sold a ZR2 Bison version with a snorkel attached. The new report claims GMC will make the elephant trunk a factory option, fitted to the driver's side this time instead of the passenger's side because of the new engine. The 35-inch tires would be a huge add-on, giving the Canyon the same kind of footprint as the Jeep Wrangler Rubicon Xtreme Recon and a couple of Ford Bronco trims. The additional two inches over the 33-inch tires on the AT4X make a big difference when the trail gets dicey. MCT says the AEV will get the same bumper as the Edition 1, which means a reduced approach angle in return for an integrated winch. The standard AT4X bumper permits a 36.9-degree approach angle, the winch-equipped Edition 1 drops that to 32.8 degrees. It's not clear which winch would hide behind that bumper, though. GMC factory fit is the Comeup Seal Slim 9.5rs rated at 9,500 pounds. AEV offers a Warn 9.5 XP-S with the same weight rating for its Colorado ZR2 Bison.  Speaking of which, since the Colorado arguably started all this, Chevy fans can expect their midsizer to acquire the same bundle as the Canyon AT4X AEV.