Where in the thermostat located on a 1994 Chrysler lhs 3.5liter motor?

The thermostat on a 1994 Chrysler LHS 3.5L engine is located at the rear of the engine, on the passenger side. It's usually housed within the engine block itself, near where the upper radiator hose connects to the engine. You'll likely need to remove some components to access it, such as some plastic engine covers or possibly even the upper radiator hose itself. A repair manual specific to your vehicle year and model will provide detailed diagrams and instructions on accessing and replacing the thermostat.