Truck maintenance is very important.With routine checks, preventive maintenance and simple replacements, you can really help prolong your truck's life and performance. Every truck purchased or leased from a reputable dealer should come with maintenance manuals. which is a vital accessory and should be kept in a safe place and be readily available. They contain valuable information about determining scheduled maintenance intervals, lubrication and fluid level checks, noise emission controls maintenance, and torque specification.We have to follow those instructions for good life of our truck.