**2021 Peterbilt 579 Day Cab – 430HP MX-11 – 12-Speed AMT – Single Axle** Now available in **Porterville, CA**, this clean **2021 Peterbilt Motors Company 579** day cab is designed for efficiency, maneuverability, and dependable performance. Finished in white with a Prestige Sterling Gray interior, this single-axle configuration is ideal for regional, local, or dedicated route operations. Powered by a **Paccar MX-11 diesel engine rated at 430 HP** (Engine Serial: X016227) and paired with a **12-speed PACCAR PO-xxF112C Automated Manual Transmission (AMT)**, this truck delivers smooth, fuel-efficient performance. The 2.93 rear end ratio and shorter 156” wheelbase provide excellent maneuverability, making it well-suited for tighter routes and urban applications. With **339,578 miles** (339,577 ECM verified) and **7,518 engine hours**, this unit has been fleet maintained and is work-ready. --- ### Key Specifications: * **Engine:** Paccar MX-11 – 430 HP * **Transmission:** 12-Speed Automated Manual (AMT) * **Axle Configuration:** Single Axle * **Front Axle Capacity:** 12,350 lbs * **Rear Axle Capacity:** 21,000 lbs * **GVWR:** 33,350 lbs * **Rear End Ratio:** 2.93 * **Wheelbase:** 156” * **Suspension:** Peterbilt Air Trac Air Ride * **Brakes:** Air * **Fuel Capacity:** Dual 50-gallon aluminum tanks (100 gallons total) * **EPA Year:** 2020 * **5th Wheel:** Stationary --- ### Exterior & Equipment: * Aluminum Front & Rear Wheels * 295/75R22.5 Tires Front & Rear * Chrome Bumper * Chrome Exhaust * Stainless Visor * Heated Mirrors --- ### Interior & Driver Comfort: * Prestige Sterling Gray Interior * Dual High-Back Seats * Air Ride Passenger Seat * Air Conditioning * Power Windows * Power Door Locks * Power Steering * Cruise Control * CB Radio --- **VIN:** 1XPBAK8X9MD751744 **Stock #:** U2238 / 751744 This non-sleeper 2021 Peterbilt 579 offers strong fuel efficiency, excellent maneuverability, and premium driver features—ready for immediate operation. Contact us today for pricing and availability.