2000 Gmc Savanna 3500 Cutaway Utility Truck on 2040-cars

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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.

2014 GMC Sierra

Is the Best GMC Truck Ever Made Good Enough?
We've got a bright aluminum Airstream camper hitched to our rear bumper as we head up Southern California's coast because GMC says that 60 percent of all full-size pickup owners will use their trucks for towing.
Rather than forcing us to absorb its capabilities in a long-winded PowerPoint presentation, the automaker brought us to Los Angeles and handed us the keys to its all-new 2014 GMC Sierra 1500. After jumping behind the wheel of a 5.3-liter V8 model, we drove up the foggy Malibu coast (locals call the soggy early-summer weather "June Gloom") and made our way to the Camarillo Airport for a towing refresher. Once completed, a brand-new 23-foot Airstream was hitched to our aft end and we were pointed towards a campground just west of Santa Barbara.

2022 GMC Yukon gets larger screen, standard power sliding console

The 2022 GMC Yukon is falling into line with its big SUV siblings, the Chevrolet Tahoe and Suburban, according to a rundown of new features on Muscle Cars & Trucks. We've already covered the availability of the 6.2-liter V8 on the AT4 trim, and it looks like GMC buyers will have an easier time of it than Chevy buyers who want the 6.2, the engine looking like a standalone option on the GMC.  Inside, the Yukon welcomes the 12.3-inch digital gauge cluster, replacing the previous eight-inch cluster that had an analogue tach and speedo. A little to the right, the infotainment system will come with Google Automotive built in, obviating the need to pull up Android Auto to get access to Google Maps, Google Assistant, and the Google Play Store. And just below that, the Yukon Denali makes the power sliding console a standard feature instead of a $350 option.  The big V8 with 420 horsepower and 460 pound-feet of torque comes with a shiny pair of exhaust finishers, plus 2022 sees the addition of Redwood Metallic paint, some new wheel options, and rocker panels that can be gussied up with illuminated sill plates. The current Yukon offers Max and ProGrade trailering packages, for next year an Enhanced Trailering Technology Package adds a 13-camera trailering bundle with the option for an interior accessory camera for those with enclosed haulers. On the safety side, expect reverse automatic braking to join the list of available driver assistance features. Related Video This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.