This paper presents the validation of an entire vehicle model of the Chevrolet Volt 2016, of which system is the new “Voltec” extended-range propulsion system introduced into the market in 2016. The second generation Volt powertrain system is operated in five operation modes including two electric vehicle (EV) modes and three extended-range modes. The model development and validation were conducted using the test data performed on the chassis dynamometer set in a thermal chamber of the Argonne’s Advanced Powertrain Research Facility (APRF). First, the components of the vehicle such as engine, motor, battery, wheel and chassis were modeled including thermal aspects based on the test data. For example, the engine efficiency changes depending on the coolant temperature or chassis’ different heating or air conditioning operations according to the ambient and cabin temperature are applied. Secondly, the vehicle-level control strategy was analyzed in normal ambient temperature condition for both charge-depleting and charge-sustaining modes. In the next step, the effect of thermal conditions such as ambient temperature conditions (–7°C, 22°C or 35°C) or vehicle initial states (soaked or warmed-up vehicle) to the vehicle-level control strategy was analyzed. Especially, the operation of heater affects many ways to the vehicle-level control strategy depending on the engine coolant temperature or the heating demands. Finally, the entire vehicle model including vehicle-level controller was implemented into Autonomie, a high-fidelity, forward-looking vehicle simulation tool. As a result, the fuel economies shows within the 5% discrepancies in most cases in the test-to-test variability, while many of the operational signals including state of charge of the battery are also matched.