2015 Peterbilt Trucks For Sale
Browse 2015 Peterbilt trucks for sale, including 579 and vocational models, with details on engines, transmissions, specs, and common applications.
Learn more
Have 2015 peterbilt truck to sell? List it here to reach thousands of buyers.
About 2015 Peterbilt Trucks
For highway use, a 2015 Peterbilt 579 is often equipped with a PACCAR MX-13 or Cummins power, paired with a manual, automated manual, or automatic transmission depending on the original fleet spec. Day cab versions are common in regional haul, port work, dedicated lanes, and private fleet service. Key items to check include wheelbase, rear axle ratio, suspension type, engine brake, and whether the truck was built for fuel economy or heavier start-stop duty. A 10-speed manual remains attractive for buyers who want lower complexity and easier field service, while automated options can make sense for fleets prioritizing driver availability and consistency.
Vocational 2015 Peterbilt trucks can vary widely, from cab and chassis units to dump, flatbed, auto hauler, and other upfit-ready configurations. On these trucks, the body and PTO setup matter as much as the powertrain. Front axle rating, rear axle capacity, frame rail spec, locking differentials, and transmission programming all affect suitability for severe service. Buyers should also pay attention to steer tire wear, suspension condition, and signs of frame modification, especially on trucks that have carried specialized equipment or seen off-road jobsite use.
A used 2015 Peterbilt is often appealing because the cab layout, parts support, and service familiarity remain strong across much of the market. The real value is in matching the truck’s original spec to the work it will do now. A lightly built day cab for regional freight is a very different purchase from a heavy vocational chassis, even if both wear the same Peterbilt badge. Service records, engine aftertreatment history, clutch or transmission condition, and any recent rebuild work should weigh heavily in the decision, especially on units that have already accumulated significant miles or engine hours.
Frequently Asked Questions
What engines are common in 2015 Peterbilt trucks?
A 2015 Peterbilt truck is commonly found with a PACCAR MX-13 or a Cummins diesel, depending on model and original order spec. In highway tractors such as the Peterbilt 579, the MX-13 is especially common and was often chosen for fuel economy and fleet standardization. The right engine depends on duty cycle, desired horsepower range, maintenance history, and local service support more than brand alone.
Is a 2015 Peterbilt 579 a good choice for regional or highway freight?
Yes, the 2015 Peterbilt 579 is a strong fit for regional and over-the-road freight when the truck is properly spec'd for the route and payload. Day cab versions work well in dedicated lanes, shorthaul, intermodal, and terminal-based operations, while sleeper configurations are better suited to longer runs. Buyers should verify rear axle ratio, transmission type, wheelbase, and maintenance history to make sure the truck matches the intended operation.
What should I inspect first on a used 2015 Peterbilt truck?
Start with the engine, aftertreatment system, transmission, and complete service history. On a 2015 model, DPF and SCR performance, fault code history, and signs of repeated emissions-related downtime are important. After that, inspect suspension, steering, brake wear, tires, frame condition, and any body or vocational equipment mounting points. A truck with the right records and a clean mechanical inspection is usually a better buy than one with a lower asking price but unknown maintenance history.
Are manual transmissions still desirable in 2015 Peterbilt trucks?
Yes, many buyers still prefer a 10-speed or other manual transmission in a 2015 Peterbilt because it can be easier to service and familiar to owner-operators and smaller fleets. Manual trucks are often attractive in regional haul, farm, and vocational work where simplicity matters. Automated transmissions can still be a good choice when driver turnover, shift consistency, or urban route efficiency are a priority.
How do I choose between a highway-spec and vocational-spec 2015 Peterbilt?
The decision comes down to axle ratings, frame strength, suspension, wheelbase, and PTO or body requirements. A highway-spec truck is built around fuel economy, ride quality, and freight efficiency, while a vocational-spec truck is designed for heavier loads, tougher terrain, and body integration. Comparing horsepower alone is not enough. The correct chassis configuration has a bigger impact on long-term usability and operating cost.