389, Heavy Duty Trucks - Conventional Trucks w/ Sleeper, Cummins ISX, 18 Spd, 2015 Peterbilt 389 70'' Flat top Sleeper Cummins ISX Engine 343,000 Miles Air Ride Suspension 24.5 Low pro Brand new drives 18 speed transmission Bunk heater Wood Grain Dash Motor has been redone at 240k miles (Pistons, liners, and rings), 550 Horse Power, Air Ride Suspension, All Aluminum Wheels, Wheel Base, , Tandem Axle, Ratio, 70 Flat Top Sleeper