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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.

2023 GMC Canyon revealed with new ZR2-based AT4X trim

Following up on the reveal of its twin, the Chevy Colorado, the 2023 GMC Canyon has made its appearance. Naturally, it shares much with the Chevy pickup, but GMC has gone to greater lengths to differentiate the truck. It comes standard with the high-output engine, all versions feature the wide-track suspension setup, and in addition to the now more luxurious Denali, there's a ZR2-based AT4X trim. As with the new Colorado, the Canyon gets an overhaul of the design. It's down to one bed and cab configuration (short-bed, crew cab), and it features a longer wheelbase with the front axle pushed forward. The Canyon does get a variety of unique design features, though. It has its own front fascia with a tall, rectangular grille. LED lighting is standard on all Canyon models all the way around. That includes the unique fender lights like those found on the Sierra HD. All Canyons also feature the wide-track off-road suspension like the Colorado Z71 and Trail Boss. There are no narrow-track, narrow-body versions, even on the base two-wheel-drive Elevation. That suspension also means all Canyons have a roughly two-inch lift over base Chevy Colorados. The GMCs also get standard 32-inch tires, and they don't feature a front air dam in order to provide better approach angles. The bed, while only available in one trim, is available with a unique storage bin in the tailgate. On the topic of suspension specs, the Elevation and AT4 trim levels have 9.6 inches of ground clearance. The Denali increases that to 10.5 inches, and the AT4X features 10.6 inches. It also picks up the Multimatic spool-valve shocks from the ZR2. But we'll talk more about what comes on the AT4X in a bit. Under the hood of the Canyon is just one engine. It gets the highest-output version of the 2.7-liter turbocharged four-cylinder. The engine makes 310 horsepower and 430 pound-feet of torque. The only transmission is an eight-speed automatic. Two-wheel drive comes standard on Elevation, and other trims come standard with four-wheel drive. The inside of the Canyon is very similar to the Colorado, but it has some unique cues. It has air vents that are more integrated into the squared-off dashboard design, rather than the Chevy's round vents. It has a differently shaped dash pad and trim surrounds, too. The really big differences come on the Denali and AT4X trims, though. The Denali features real wood trim with laser etchings. It also gets lots of real leather and fancy stitching.

GM trademarks 'GearOn,' possibly for pickups

On May 27, a week before General Motors applied for a trademark for the word "Zora," GM filed a trademark application at the US Patent and Trademark Office for "GearOn," characterized as a "truck bed cargo system comprised of tiered storage cross rails, utility rack stanchions, cargo dividers and cargo tie down rings."
We have no idea what it will be or if we'll see it used on anything, but GM Authority reckons it could be GM's name for a pickup truck feature to rival the BoxLink system Ford introduced on the 2015 F-150. BoxLink has been described as having "dozens of configurations of stowable cargo ramps and lockable die-cast aluminum tie-down cleats," giving owners the ability to arrange the bed in they way they need and load unwieldy items like motorcycles without needing extra equipment.
Getting purely speculative, a month ago GM pickup truck engineers said there would be more and more regular updates for the Chevrolet Silverado and GMC Sierra starting next year. Beyond the suspected capability and fuel economy changes GearOn could be one of the "neat things coming in a whole host of areas."