2008 Sierra 3500hd Diesel 4x4 Dually Slt Heated Leather Bose on 2040-cars

Auto blog

GM's fullsize SUVs boost highway mileage by nearly 10 percent

We met the redesigned 2015 versions of the Chevrolet Suburban and Tahoe, and the GMC Yukon and Yukon XL at the 2013 LA Auto Show. Improved gas mileage numbers have been announced to go along with the improved exteriors and interiors, with city mileage improving by seven percent and highway mileage going up by nearly ten percent; you'll now get 16 miles per gallon in the city and 23 on the highway.
The only applies to models with the 5.3-liter engine, though, not the premium Yukon Denali and Yukon XL Denali SUVs with the 6.2-liter motor. Still, the 5.3 gets you more power than previously, with 355 horsepower and 383 pound-feet of torque underfoot, on top of the improved fuel economy numbers. The 6.2-liter sticks with official mpg ratings of 15 highway, 21 city. There's a brief press release below with words straight from the horse's mouth.

2021 Chevy Silverado, GMC Sierra fuel economy to go down due to global chip shortage

Production of the 2021 Chevy Silverado and 2021 GMC Sierra is continuing, but the global semiconductor chip shortage is resulting in a mid-year change. Or rather, an omission.  Basically, the availability of cylinder deactivation for the 5.3-liter V8 will be significantly reduced, resulting in a reduction of 1 mpg combined for affected models. This applies whether that engine has the six- or eight-speed automatic, as well as to both the regular Active Fuel Management and the more advanced Dynamic Fuel Management cylinder deactivation systems. DFM does remain with the pairing of 5.3-liter V8 and 10-speed automatic that comes standard on the LT Trail Boss and High Country. "Due to the micro controller shortage, the components that control AFM/DFM in the engine control module (ECM) have been removed," GM spokesperson Michelle Malcho told Autoblog. She also indicated that the engines will still have the AFM/DFM hardware in place, but that GM will not allow activation of the systems in the future with an ECM change.  Malcho also confirmed to Autoblog that the Silverado and Sierra's other engines will continue to have AFM and DFM, including the 2.7-liter turbo inline-four, 4.3-liter V6 and 6.2-liter V8. In an earlier statement to Reuters, she declined to say the volume of vehicles affected. "By taking this measure, we are better able to meet the strong customer and dealer demand for our full-size trucks as the industry continues to rebound and strengthen," Malcho wrote Reuters in an email. The change runs through the 2021 model year, she said. Malcho told Reuters it would not have a major impact on the Detroit automaker's U.S. corporate average fuel economy (CAFE) numbers. "We routinely monitor our fleet for compliance in the U.S. and Canada, and we balance our portfolio in a way that enables us to manage unforeseeable circumstances like this without compromising our overall (greenhouse gas) and fuel economy compliance," she said. GM's fleetwide fuel economy in the 2018 model year was 22.5 miles per gallon and was projected to rise to 22.8 mpg for 2019, according to a report by the Environmental Protection Agency. To meet federal CAFE requirements, automakers like GM often use credits from either earlier years where they faced less stringent rules and performed better than the requirements or buy credits from other automakers. GM said last month the chip shortage could shave up to $2 billion from this year's earnings.

2022 GMC Canyon gets a few tiny changes

After overhauling the GMC Canyon lineup into Elevation Standard, Elevation, AT4, and Denali for the 2021 model year, GMC has sprinkled just a few changes on the 2022 Canyon. The midsized pickup's appearance outside and inside doesn't change. The sole alteration in the cabin is that wireless charging won't be come standard on Denali next year, but be an option. That could be GM making lemonade out of lemons, telling customers that if they want hard-to-find semiconductor chips then they're going to have to kick in more dough. The only other change is a new gloss black aluminum spare wheel for the AT4 trim when specced with a Crew Cab and a short bed. This rim replaces the steel spare wheel that remains standard fit on Elevation, Elevation Standard, and Denali. And anyone looking for the High Elevation Package will need to look for it by its new name, the Elevation Premium Package. The Denali Black Edition Package is new for next year for $2,295 on gas-powered models that aren't fitted with the Power Package or the Cat-Back Performance Exhaust. On the exterior, this adds five-inch black assist steps to replace the chrome units, black chrome exhaust tips instead of polished tips, and 20-inch low-gloss-black aluminum wheels with black GMC logo center caps. Inside come premium all-weather floor mats taking the place of the carpeted mats. The current, second-generation Canyon doesn't have long to live, with the third-generation pickup expected for the 2023 or 2024 model year. Spy shots from earlier this year make us think the Canyon and its Chevrolet Colorado twin will pick up styling to emphasize their connection to GM's larger half-ton pickups. Rumor also has it that the Silverado will donate what may be the new midsizer's only powertrain, a turbocharged four-cylinder engine — the new corporate 2.7-liter turbo in this instance. That 310-horsepower mill would supplant both the 2.5-liter four-cylinder 3.6-liter V6 gas engines now available, and the 2.8-liter Duramax diesel. It does, however, appear that GMC will get its own version of the Colorado ZR2, spy shooters catching a camouflaged, high-rise Canyon on a set of Multimatic DSSV dampers. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.