579, Heavy Duty Trucks - Conventional Trucks w/ Sleeper, Paccar MX-13, Automatic, YOUR SEARCH IS OVER!! This APPEALING 2016 Peterbilt 579 has a Paccar MX-13 engine with 455 HP, 80" sleeper with bunk beds! Call us now and ask for our used truck specialist! Visit us at for more information. Also, Check out our variety stock of used Kentworth's, Volvo's and Freightliner's From 18 different locations!, 455 Horse Power, Suspension, Wheels, 238 Wheel Base, 22.5, Tandem Axle, Ratio, 80 Hi Rise Sleeper