In today's dynamic market scenario and with the change of user priorities, NVH refinement has utmost importance for quiet and vibration free vehicles. This trend of refined NVH vehicles is seen getting well accepted by commercial vehicle segment also. Feeling of discomfort resulting in health issues also looking at its maximum usage in urban and rural areas. This demands boom noise free cabins, and lower tactile vibration of the vehicle. Noise within the vehicle is influenced by excitation from the engine, driveline, exhaust system, road excitations, suspension of the vehicle structure (structure borne noise) and its radiation into the air (air borne noise). This paper discusses the approach used to reduce "In-cab boom" noise in the operating speed sweep condition and seat track vibration during engine IDLE condition to improve driver comfort. In this paper NVH refinement was carried out on small commercial vehicle. Higher Seat track vibrations during IDLE and In-cab boom noise during speed sweep condition were observed during development of the product viz. small commercial vehicle. One of the power train rigid body mode was coupled with IDLE excitation firing frequency in this vehicle. The use of optimized PT mounts stiffness, resulted into decoupling of PT rigid body mode from IDLE excitation frequency and thus reducing the seat track vibrations to acceptable level. Another challenge was of In-cab noise with boom perception in speed sweep condition in customer driving pattern which was contributed by Exhaust and Intake noise. The exhaust engine firing orders were attributed to higher In-cab noise. Boom noise perception was reduced with silencer design optimization. The silencer design optimization was carried out through GT power simulation. Intake noise is mostly attenuated by passive control techniques. One of the technique is Helmholtz resonator. Helmholtz resonator was designed and evaluated on vehicle to address resonance at Intake system for the vehicle. This journey involves various activities like noise, vibration measurement and analysis, experimental modal evaluation, tuning of corrects stiffness of mounts, virtual simulation and finally evaluation on vehicle. It was observed that the engine mounts with correct stiffness's, seat track vibration reduced by more than 50% during IDLE condition, optimized design of exhaust silencer & with Helmholtz resonator at Intake system, the In-cab boom noise was reduced by 6 to 8 dB(A) resulted into the targeted NVH performance.