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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.

Hummer teases crab mode, reveal set for Oct. 20

DETROIT — GMC confirmed it will reveal the Hummer electric off-roader Oct. 20 and released a video teasing the vehicleÂ’s so-called crab mode. Crab mode allows the Hummer to move diagonally and is enabled by the vehicleÂ’s four-wheel steering. The video shows tires, and well, a crab. “When you're in the really difficult terrain, this just gives you unparalleled maneuverability,” said Duncan Aldred, global vice president of Buick GMC. The Hummer will be offered as truck and SUV models, and customers will be able to make reservations beginning on the reveal date. Deliveries are expected to begin in fall 2021. The Hummer was supposed to be revealed May 20, but was delayed due to the Covid-19 pandemic. The Hummer was teased in a Super Bowl ad this year with NBA superstar LeBron James, who is the vehicle's frontman. It will have several EV powertrains which General Motors calls Ultium, and the most capable variant will have an estimated 1,000 hp and hit 60 mph in three seconds. The Hummer will also offer removable roof panels. “This is very much going to be a luxury vehicle which competes against a broad spectrum,” Aldred said Monday on a conference call with reporters. The Hummer will take aim against a variety of vehicles, including the four-door Bronco, RivianÂ’s truck and SUV and the Jeep Wrangler 4xe. Aldred is optimistic the return of the Hummer name will help GMC carve its niche in this growing segment of trucks and SUVs with varying degrees of electric propulsion and off-road capability. GM sold vehicles under the Hummer brand from 1992-2010, before scrapping it in the wake of GMÂ’s historic 2009 bankruptcy and restructuring. Hummer is relaunching under the GMC umbrella. “ItÂ’s real desirability, itÂ’s almost cult-like status,” Aldred said. “I think a huge amount of people are going to have interest in this.” GM, which is re-emphasizing its defense division, could also repurpose the Hummer for military use, perhaps as transport vehicles. Hummers are descended from the Humvee, which is still used by U.S. forces.

2022 GMC Hummer EV dimensions, clearances and off-road features explained

There are two things that almost everyone immediately thinks of when they hear the word "Hummer." And they are size and off-road capability. Looking at the numbers on the 2022 GMC Hummer EV, it seems the electric pickup has literal truck loads of each. One of the most prodigious numbers is the truck's width. See those clearance marker lights on the roof? They aren't just there for style, they're required by law due its width. At 86.7 inches, it's just a bit wider than a Ford F-150 Raptor, which is itself 6.4 inches wider than a comparable F-150. The Hummer is also 5.5 inches wider than a GMC Sierra. Length is more reasonable at 216.8 inches, which is much less than a full-size crew cab pickup (a Sierra 1500 is 231.7 inches with its 5-foot-8-inch box or 241.2 with the 6-foot-6 one). It's even 3 inches less than the Raptor SuperCab and only 4.4 inches longer than a GMC Canyon with the standard 5-foot-2-inch box. In other words, the Hummer EV is roughly as long as a midsize pickup but is wider than a heavy-duty one.  What does that mean for the cabin? With 38.9 inches of rear legroom, it falls well short of a Sierra Crew Cab's 43.4, but it's important to remember that crew cab pickups have an overkill amount of limo-like legroom. The Hummer's amount is still 3.7 inches longer than a Sierra Double Cab and 3.1 inches longer than a Canyon Crew Cab. Headroom, which was rather pathetic in the old Hummer H2, is 38.6 inches in the back seat – less than both its GMC truck siblings, but not by much. In other words, there should be plenty of space back there. Note that GMC didn't indicate bed length, frunk volume, or importantly, curb weight. We will update this should we find out answers to any of those.  Although it's big, the Hummer has plenty of features to make it nimble off road, both traditional and high-tech. One of the primary features is the height-adjustable air suspension, which offers 13 inches of travel and automatically adjusts damping for driving conditions. It has three main levels, a lowered setting for Aero Mode that helps with improving highway energy use, a default height for the normal driving modes, and a higher setting for the off-road Terrain Mode.