2023 Kenworth T680

Category, Trucks, conventional sleeper. Mileage at 632,497 points to a highway-heavy duty cycle, so the value is in straight tracking, stable temps, and clean service history more than cosmetics. Serial number 1XKYD49X0PJ233710, stock 0635235. Powertrain details are not provided, so verification matters, engine family, transmission model, rear ratio, and any active fault history through an ECM pull. ECM status is listed blank, so plan on a scan for inactive and active codes, aftertreatment health, regen history, and a look at soot load and derate events before assigning any confidence to performance. Frame rails and crossmembers should be checked for straightness, corrosion at fastener points, and any evidence of prior tow or jack damage. Fifth wheel condition is a wear indicator on high-mileage sleepers, look for jaw wear, top plate grooving, slider operation, and air line routing for chafe. Cab upholstery, sleeper trim, and driver touch points, seat base, pedals, steering wheel, shifter, tell the story on actual use, while dash warning history and switchgear function confirm whether it has lived on cruise control or in stop and go. Cooling stack and charge air plumbing deserve a close look at this mileage, bent fins, oil film at CAC boots, and clamp witness marks can point to boost leaks. Brake and tire wear patterns, steer feathering, drive cupping, and rotor or drum condition help confirm alignment and suspension health, while air system performance, compressor build time, dryer purge, and air leaks at fittings should be checked during a cold start and full pressure cycle.