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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.

2022 GMC Terrain from $600 to $900 less expensive

The 2022 GMC Terrain is another one of those vehicles that, despite current economic trends, costs less than the 2021 model year — and GMC hasn't cut equipment as a way to justify the cuts. That doesn't mean there aren't any changes, though. The base SL trim level is gone, the SLE taking over at the entry-level point. Opting for AWD on the SLE and SLT trims adds $1,600 to the price, no change from 2021. Slotting into the lineup to maintain a four-trim range is the AT4 model that tilts at off-road use. The top shelf Terrain Denali no longer comes with front-wheel drive, either, AWD the only choice now. That makes the only Denali $700 more expensive than shoppers could pick up a 2021 Terrain Denali for; however, the AWD model is less expensive. Prices for the 2022 Terrain and the differences from 2021, after the $1,195 destination charge, are: SLE FWD: $30,290 ($600 less)  SLT FWD: $34,290 ($700 less) AT4 AWD: $36,390 (New model) DENALI AWD: $39,190 ($900 less) As part of the refresh for 2022, all Terrains get larger grilles, all-LED exterior lighting with larger headlights and new C-shaped taillights. Both the AT4 and Denali get unique grille designs, the former fitting a gunmetal grey design with thick slats, the latter an all-chrome matter with more delicate lattice-work between the slats. The AT4 also boasts a front skid plate for protection, plus chunkier tires. The Elevation trim returns, too, as a black-out appearance package for the more entry-level SLE and SLT trims. The interior is mostly unchanged except for a revised shifter panel — the buttons are new, but the same controversial design remains. There are new features available, though. Apple CarPlay and Android Auto are still standard, but now they're wireless. A head-up display is available as an option for SLT and AT4, while it comes standard on the Denali. The Denali also gets an 8-inch screen in the instrument panel. Only the turbocharged 1.5-liter four-cylinder and nine-speed automatic have been announced for the Terrain, making the same 170 horsepower and 203 pound-feet of torque as before. We're expecting a higher-horsepower, larger-displacement engine to be offered in the near future. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

GM also sheds parts from its pickups to boost payload ratings

The row between Ford and Ram over who boasts the best-in-class tow rating for heavy duty pickups has revealed a number of things. Chief among them is a report that Ford removes items like the spare tire, jack, radio and center console from its vehicles in a bid to lower its base curb weight and therefore keep the truck's gross vehicle weight rating down.
For those that need a refresher, GVWR is the vehicle's curb weight plus its maximum payload. A lower GVWR allows Ford to station its F-450 among the so-called Class III pickups, despite the fact that internally, it has the makings of a more brutish Class IV truck.
Ford explains away these deletions, saying a customer could order their vehicle in such a manner. It has also come to light that Ford is not the only automaker to engage in such practices.