Diagnose cause of any malfunction and perform repairs to manufacturer specifications, including but not limited to engines, transmissions and clutches, drive-line, differential, steering and suspension, fuel and ignition system, exhaust systems (including regeneration systems), intake systems, electrical systems, brake systems, HVAC systems and lift-gate hydraulic, mechanical and electrical systems. Perform quality preventive maintenance inspections per company methods on all fleet vehicles, including tractors, trailers, converter dollies, refrigeration units (Reefer), lift-gates, light-duty vehicles, and any other company-owned equipment.