Barely a month after we first told you about Callaway's plans for the new Chevrolet Silverado and GMC Sierra, the Connecticut-based tuning shop has shown its first completed model. Using a Silverado, Callaway has fitted an Eaton TVS supercharger and developed a new calibration for GM's powertrain management system.
Last week, PickupTrucks.com held one of its periodic load lugger shootouts where it brings together the heavy haulers from General Motors, Ford and Chrysler to see which pickup truck is the top dog. After running acceleration tests at Milan dragway, editor Mike Levine and the crew moved the fleet of nine trucks to the GM Proving Ground in Milford, MI. During towing evaluations on the 7.2 percent hill, Levine discovered an issue on the Chevy Silverado 2500 while the gas-engined 3/4 ton truck was