Minor services vary by make and model and include an oil change; lubricating the chassis if it’s not factory sealed; inspection of fluids, filters, belts, hoses, brakes, and emissions;and tire rotation if recommended.
Major services also vary by the vehicle’s make and model. The services include everything you get with minor maintenance. You also have your filters, fluids, and spark plugs replaced along with the timing belt based on the manufacturer’s recommended replacement interval. Other major services relate to the fuel delivery, emissions, and ignition systems.