2014 Chevrolet Impala Owner Manual - Page 231

Driving and Operating . 9-23 Shifting out of D (Drive) to any other gear. The air conditioning or defrost system need the compressor to maintain vehicle comfort. See Dual Automatic Climate Control System on page 8-3 The warmer it is outside, the shorter the time before the engine is restarted to provide cabin cooling. To maximize fuel economy, use the eco air conditioning mode. The climate control system is turned from off to normal air conditioning or defrost. See Dual Automatic Climate Control System on page 8-3. The engine is required to run for either heater or climate control performance. See Dual Automatic Climate Control System on page 8-3. The high voltage battery pack charge is low and requires recharging. Auto stop time is greater than two minutes. . The hood is opened. . Engine Heater The engine coolant heater, if equipped, can help in cold weather conditions at or below −18°C (0°F) for easier starting and better fuel economy during engine warm-up. Plug in the coolant heater at least four hours before starting the vehicle. An internal thermostat in the plug end of the cord will prevent engine coolant heater operation at temperatures above −18°C (0°F). { Warning 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. 4. Before starting the engine, be sure to unplug and store the cord as it was before to keep it away from moving engine parts. The length of time the heater should remain plugged in depends on several factors. Ask a dealer in the area where you will be parking the vehicle for the best advice on this. . . To Use the Engine Coolant Heater 1. Turn off the engine. 2. Open the hood and unwrap the electrical cord. The electrical cord is on the driver side of the engine compartment, between the fender and the engine compartment fuse block. 3. Plug it into a normal, grounded 110-volt AC outlet. . .