2020 Mack PINNACLE

Category, Trucks. Mileage profile, 318k on a conventional daycab points to a highway and regional duty cycle, the kind of service where cab access, cooling system upkeep, and driveline angles matter more than sleeper amenities. Serial and stock tracking, VIN 1M1PN4GY1LM006714, stock B3806, support maintenance history checks and component verification. Powertrain, engine, transmission, and axle ratio are not provided, so application fit cannot be tied to horsepower, gear split, or cruise RPM. ECM status is not listed, so plan on confirming active fault codes, aftertreatment history, and idle hours with a scan, then matching the report to service records. Frame rails, steer axle ends, and suspension bushings are the wear checkpoints at this mileage, look for flange cracking, loose U-bolts, and evidence of prior alignments. Fifth wheel top plate and slide rails should be checked for jaw wear, release handle slop, and dry spots, then verify air system build time, brake chamber stroke, and tire match across the axle set. Cab interior, pedal pads, seat base play, and door hinges give an honest read on day-to-day use, then confirm dash warning history and HVAC function under load.