Coolant Heater
WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
The optional engine coolant heater (RPO K05) is rated at 400 watts and supplies 1365 Btu/hr. The engine coolant heater operates using 110-volt AC external power and warms the coolant in the engine Block area for improved starting in very cold weather, up to -29°C (-20°F). The coolant heater helps reduce fuel consumption when a cold engine is warming up. The unit is equipped with a detachable AC power cord. A weather shield on the cord protects the plug when not in use.