NASHVILLE, Tenn. — An Oklahoma woman won Rush Truck Centers’ sweepstakes to give away the last Peterbilt Model 389x produced. The winner, Jennifer Best of Pryor, Okla., was presented the keys to the shiny red tractor by Rush Enterprises CEO W.M. “Rusty” Rush during an Oct. 14 news conference at American Trucking Associations’ Management Conference & Exhibition.