Where is thermostat on 1996 dodge Cummins diesel?

The 1996 Dodge Cummins diesel doesn't have a thermostat in the traditional sense, like a dial you turn to adjust temperature. Instead, it has a thermostat located in the engine's coolant housing. It's not easily accessible and requires removing parts to reach it. You'll need to consult a repair manual specific to your 1996 Dodge Cummins engine (the specific engine code matters - e.g., 12 valve, 24 valve) to locate the exact position. It's generally tucked away within the coolant system, near the engine block and water pump.