Used Service/Utility Trucks For Sale

Start with wheelbase and cab-to-axle, because the body you need dictates the chassis. Most single rear wheel Class 3 setups run 56-60 CA with 8-9 ft bodies; dual rear wheel Class 3-5 use 60-84 CA for 9-11 ft mechanic or utility bodies. Common GVWR spans 10,000 to 19,500 lb, with 19.5 in rubber and heavier springs appearing from 12,500 lb and up. Bodies include open service bodies with 3-4 compartments per side, enclosed KUV style with walk-in height, and crane-equipped mechanic bodies rated 3,000-10,000 lb. Also known as mechanic trucks or utility service bodies, typical upfit brands include Knapheide, Reading, Stahl, Royal, and IMT or Stellar for cranes, with options for ladder racks, drawers, vise mounts, and reel cabinets that turn the truck into a mobile shop.

Powertrain choice affects capability and cost. Gas V8s like Ford 7.3, GM 6.6, and Ram 6.4 offer lower purchase cost, simpler emissions, and predictable behavior at high idle for PTOs and compressors. Modern diesels like 6.7 Power Stroke, 6.7 Cummins, and 6.6 Duramax deliver more torque for towing, high-altitude work, and hydraulic cranes, but add DEF, DPF, and higher service costs. 4x4 with a limited slip or locking rear diff matters on job sites and in winter, yet reduces payload and raises ride height. Look for factory PTO provisions, dual alternators, high idle, and upfitter switches if you run hydraulic or electric-hydraulic cranes, VMAC or belt-driven air compressors, or welder-generator combos.

Body construction drives longevity and payload. Steel bodies are durable and cost effective but are prone to corrosion in salt states; aluminum saves 500-800 lb on a 9-11 ft body, resists rust, and returns payload that cranes and drawers consume. Open bodies give fast curbside access and lower roof height for urban garages, while enclosed KUV bodies secure inventory, keep techs and tools out of the weather, and add vertical storage at the expense of rear visibility and wind drag. DRW increases stability under cranes and towing but adds width; SRW fits tight sites and can lower operating costs in some regions. Class 4-5 chassis on 225/70R19.5 tires run stiffer and last longer than LT17 tires on pickup-based builds. Hydraulic brakes are standard through Class 5, with air brakes appearing on heavier utility rigs.

On used service and utility trucks, evaluate the upfit first. Check door seams, compartment floors, hinges, and crossmembers for rust and prior weld repairs, confirm latches and weather seals, and verify drawer slides and reel winds operate smoothly. Inspect crane pedestals for cracks, outrigger wear, and hydraulic leaks, and ask for the last annual crane inspection and load test. Review compressor and PTO hour meters, not just odometer miles, and scan for excessive idle hours. Electrically, look for clean wiring, battery isolators, inverters, and functioning strobes or work lights. Finally, reconcile payload after upfit by weighing the truck, match axle ratings to tire ratings, confirm hitch class and trailer brake controller, and make sure the configuration meets CDL and state weight rules.