The engine coolant heater can provide easier starting and better fuel economy during engine warm-up in cold weather conditions at or below 0°F (-18°C). Vehicles with an engine coolant heater should be plugged in at least four hours before starting. Some models have an internal thermostat in the cord which will prevent engine coolant heater operation at temperatures above 0°F (-18°C).

1. Turn off the engine.
2. Open the hood and unwrap the electrical cord.

For the 3.6L V6 and 4.4L V8 engine, the cord is located in the front of the engine compartment, on the passenger side of the vehicle.

For the 4.6L V8 engine, the cord is located in the engine compartment on the driver side of the vehicle near the inner fender and above the strut.

3. You must remove the plastic cap to access the plug.
4. Plug it into a normal, grounded 110-volt AC outlet.

Caution: Plugging the cord into an ungrounded outlet could cause an electrical shock. Also, the wrong kind of extension cord could overheat and cause a fire. You could be seriously injured. Plug the cord into a properly grounded three-prong 110-volt AC outlet. If the cord will not reach, use a heavy-duty three-prong extension cord rated for at least 15 amps.

5. Before starting the engine, be sure to unplug and store the cord as it was before to keep it away from moving engine parts. If you do not, it could be damaged.

The length of time the heater should remain plugged in depends on several factors. Ask a dealer/retailer in the area where you will be parking the vehicle for the best advice on this.