Exterior noise reduction of a vehicle has become important now a day in order to meet the stringent pass by noise regulations. First step in this process is the identification of dominant noise sources. There are several noise sources which can contribute to the pass by noise like gearbox, turbocharger, oil sump, exhaust muffler, air intake etc. The experimental modal analysis & vibration measurements of the powertrain components along with near field noise measurements are used in identifying the noise sources. This paper discusses about the exterior noise reduction of a shortest wheel base intermediate commercial vehicle which is having a 4-cylinder inline diesel engine.