7.4 liter/454 Vortec engine; 10,500 lb towing capacity, 12 mpg highway. 174,000 highway miles. SLT package with all options including leather. Towing package, trailer brake, extra suspension, ball. 4/6 tires fair; full tune up last summer; recent front end work (calipers, brake shoes & tie rod). You won't find a smoother, easy driving truck unless it's a similar dually. Only selling because we needed more towing capacity for new heavier trailer. Title in hand.