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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.

GM SUV window switch recall urges owners to park vehicles outside

It's not unusual for there to be a lag between an automaker announcing a recall and the official documentation showing up on the National Highway Traffic Safety Administration website. So it's no surprise that a recent GM campaign took about a month to appear in its official capacity. However, there appears to be some big differences between the two reports with potential safety implications.
In late June, GM announced that it needed to recall 181,984 examples of the Chevrolet Trailblazer, Buick Rainier, GMC Envoy, Isuzu Ascender and Saab 9-7x from the 2005-2007 model years, plus the 2006 Chevy Trailblazer EXT and 2006 GMC Envoy XL. The new documents paint a slightly different picture with 184,611 needing repaired and different model years listed.
The reason for the fix is still the same, though. It's possible for fluid to contact the master power window switch module in the driver's door, which can corrode the part. Eventually this could cause a short circuit, leaving the buttons inoperable and potentially leading to a fire. But the new NHTSA documents add an important note: "A fire could occur even while the vehicle is not in use. As a precaution, owners are advised to park outside until the remedy has been made."

The 2021 F-150 elevates Ford's bed game

The new 2021 Ford F-150 is ushering in a new era of pickup capability, but there's more to it than the introduction of the PowerBoost hybrid. While that new powertrain is certainly the truck's headlining element, the supporting electrical architecture enables a level of utility that hasn't been offered in past consumer half-tons. The true party trick is Ford's new "Pro Power Onboard" feature, which is essentially a built-in generator that provides juice for the 2021 F-150's rather robust in-bed power station. This system is available even on gasoline-engine models, but its utility is maximized with the electrified powertrain. ICE models equipped with the option max out at 2.0 kilowatts, while the PowerBoost hybrid can be had with either a 2.4- or a whopping 7.2-kilowatt inverter.  The idea here is that the F-150 can essentially stand in for a high-output portable generator. In a worksite example provided by Ford, a PowerBoost model with the 7.2-kW upgrade and a single tank of fuel could provide 32 hours of power for an 1,800-watt compound miter saw, a 1,000W circular saw, a 1,200W battery charger, a 1,200W hammer drill, and a 1,000W air compressor with hundreds of watts to spare for lighting and other accessories. But even without the Pro Power Onboard option, Ford's new bed setup enables more versatility than in previous models. The new Tailgate Work Surface option adds a flat work area with integrated rulers, recesses for pencils or small tools, and even a stand for a personal device.  Ford is neither the first to offer an auxiliary power outlet in a half-ton pickup bed, nor was Ford the first to introduce a more feature-rich tailgate. GMC's MultiPro tailgate was a major innovation on that front, and while it is geared mostly toward improving the cargo utility of the bed, it can also be customized with 12-volt power and even an accessory speaker system. The Ram 1500 is also offered with both a multi-function tailgate and AC power in the bed, though the latter option is limited to models with the RamBox cargo package.  As half-ton pickups approach levels of towing and hauling capability that begin to blur lines with heavy-duty offerings, it's clear that automakers are looking for ways to differentiate themselves without stepping on their own bigger trucks' toes. These new bed and tailgate innovations may yet be the tip of the iceberg when it comes to full-size pickup versatility. Related Video: