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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.

2023 Detroit Auto Show Mega Photo Gallery: All the new reveals and first looks

The 2023 Detroit Auto Show didn’t play host to a lot of reveals, but on top of the new cars that were revealed there, automakers brought a whole bunch of cars we havenÂ’t seen in person yet. In a show of home strength, all the big reveals came from the hometown Big Three, with Ford, GM and Stellantis playing host to the most important unveilings. We took Huntington Place by storm to capture all of the new cars and sights to see in Detroit, and you can see everything we did in the series of galleries below. Interesting special editions like the 2024 Ford F-150 Lightning Platinum Black Edition and the 2024 Chevrolet Camaro CollectorÂ’s Edition found some floor space alongside bigger debuts like the refreshed gasoline-powered F-150 and 2024 Jeep Gladiator with its new interior. If you wanted to see it all yourself, make sure you check out our guide on how to attend the public show days. Scroll on down to see all of the galleries for all of the big Detroit debuts.   2024 Ford F-150 2024 Ford F-150 Tremor View 22 Photos   2024 GMC Acadia 2024 GMC Acadia AT4 View 17 Photos   2025 Cadillac CT5 2025 Cadillac CT5 View 15 Photos   2024 Jeep Gladiator 2024 Jeep Gladiator Live View 10 Photos   2025 Ford Mustang GTD Mustang GTD View 9 Photos   2024 Ford Mustang Mach-E Rally 2024 Ford Mustang Mach-E Rally View 10 Photos   Chevrolet Colorado ZR2 AEV Bison Chevrolet Colorado ZR2 AEV Bison View 6 Photos   2024 Ford F-150 Lightning Platinum Black 2024 Ford F-150 Lightning Platinum Black View 11 Photos   2024 Chevrolet Camaro CollectorÂ’s Edition ZL1 1LE 2024 Chevrolet Camaro Collector's Edition ZL1 1LE View 8 Photos   2024 GMC Sierra EV Denali 2024 GMC Sierra EV Denali View 8 Photos   Related video: Design/Style Green Detroit Auto Show Cadillac Chevrolet Ford GM GMC Jeep Technology Truck Coupe Crossover SUV Electric Hybrid Luxury Off-Road Vehicles Performance Sedan

C7 Corvette turbo with 1,000 horsepower promised from Hennessey

If you can't wait for the next-generation Chevrolet Corvette ZR1, Hennessey says they will have you covered. The Texas-based company has announced it will offer a spate of upgrades for the 2014 Corvette ranging from a range of bolt-on options all the way up to a 1,000-horsepower, twin-turbo system. Buyers can start with a cold air intake, cat-back exhaust or stainless steel long-tube headers, but Hennessey says it will also offer up three stages of forced induction mayhem should those bits and baubles not provide enough thrust.
Those choices start with a supercharger system good for up to 700 hp, though Hennessey will gladly ditch the blower in favor of two turbos. Doing so will spin the crank to the tune of 800 horsepower all the way up to a certifiably ludicrous 1,000 ponies. There's no word on how much these tricks will cost you - or when they will be available, as we're guessing they haven't gotten their hands on the car yet - but you can head over to the Hennessey site to drop them a line if you're curious.