Heavy Duty Trucks - Conventional Trucks w/ Sleeper, Air Trac Suspension, All Aluminum Wheels, Wheel Base, Tri Axle, Unibilt, , 2007 PETERBILT 379-127. 63 UNIBILT SLEEPER. TRI AXLE HEAVY HAUL TRUCK. DUAL STACKS, 15 SS BREATHERS. 3 DOOR HEADACH RACK. FULL FENDERS. NICE TRUCK ON CONSIGNMENT FROM A PREMIUM HEAVY HAUL COMPANY IN ATLANTA. CALL FOR MORE DETAILS.