GMC increased the range for its new Sierra Denali electric pickup to 440 miles.GMCGMC increased the range for its upcoming Sierra EV Denali Edition 1 to 440 miles.That's one of the best numbers among electric pickups, including the Tesla Cybertruck.Demand for pricey electric trucks is slowing.The latest electric pickup on the market may go a lot farther than Tesla's Cybertruck — literally.GMC announced the final specs for its new Sierra EV Denali Edition 1, including a range of about 440 miles — a 10% increase from the initial 400-mile estimate.That's also 100 miles more than the Cybertruck, its most high-profile competitor, which has an advertised range of 340 miles for its beefiest version.