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GMC Syclone spools up a storm on Jay Leno's Garage

A storm was brewing on American roads in the early 1990s. That's when Detroit's automakers were producing some of the hottest performance trucks ever devised – models like the Ford Lightning, GMC Typhoon, and its flyweight pickup sibling, the GMC Syclone. Jay Leno just happens to have one of the latter in his garage, and took it out to showcase in this latest video segment. The Syclone was an exercise in absurdity, and could not only trounce any other pickup on the road, it could outrun anything else GM made and just about anything else on the road – beating Ferraris and Porsches off the line. In a pickup, for crying out loud. The kicker is that its engine wasn't such a monster, either: under the hood sat a 4.3-liter turbocharged V6 pumping out what would seem by today's standards to be an adequate 280 horsepower and 350 pound-feet of torque. Even the smaller of the EcoBoost V6s available in today's Ford F-150 produces more than that. But in a lightweight, compact pickup, those figures were enough to propel the Syclone to 60 in 4.3 seconds and run the quarter-mile in 13.6 seconds. Long before the dune-jumping Ford F-150 SVT Raptor or even the Viper-powered Dodge Ram SRT-10, GM made fewer than 3,000 Syclones based on the compact Sonoma (sister to the Chevy S-10) and another 4,700 of the Typhoon, which was mechanically similar but more practical (albeit heavier) wagon bodywork from the Jimmy. But as Jay aptly points out, the Syclone was the one you wanted. Scope it out in the ten-minute video clip above.

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 GMC Sierra AT4X could swipe a few parts from the AT4X AEV

GM recently expanded its collaboration with American Expedition Vehicles beyond the Bison herd with the 2023 GMC Sierra AT4X AEV. This Jimmy takes matters further than the standard AT4X by increasing ground clearance, approach and departure angle, and breakover angle, improvements made possible by new stamped steel bumpers and a set of 33-inch mud-terrain tires wrapping 18-inch AEV Salta wheels. GM Authority says the AT4X AEV won't be the only Sierra to get special parts, crediting sources for the news that the standard 2023 Sierra AT4X will get some of the equipment from the special trim. According to the report, at some point for the coming model year, the off-road-focused Sierra will bolt on the AEV's stamped steel front and rear bumpers, stamped steel front skid plate, and 33-inch Goodyear mud terrains. If this is true, it's an intriguing move; the equipment list is nearly everything found on the proper AEV model. Going by that list, the only bits left off would be four additional skid plates, wheels, gloss black door handles, gloss black tailgate accent, and AEV logos. Judging from the GMC retail website, the grille that debuted on the AT4X AEV will also be on the standard AT4X.  GMC hasn't announced pricing for the 2023 range yet. The pickup will be carryover, but we would expect various well-known issues to increase the $78,300 price of the regular AT4X over the 2022 model. GMA believes "it's reasonable to assume" that a standard 2023 Sierra AT4X with some AEV parts would go up even more, whenever it hits the market — and this is on top of the Sierra's $1,500 price increase from making OnStar standard equipment. And after that, of course, the proper AT4X AEV would be more again.