Buick Regal Owners & Service Manuals

Buick Regal: Engine Heater

The engine coolant heater, if available, can help in cold weather conditions at or below -18 ВєC (0 ВєF) 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 ВєC (0 ВєF).

To Use the Engine Coolant Heater

1. Turn off the engine.

2. Open the hood and unwrap the electrical cord.

The electrical cord is located

The electrical cord is located on the passenger side of the engine compartment, between the fender and the air cleaner.

Check the heater cord for damage. If it is damaged, do not use it. See your dealer for a replacement. Inspect the cord for damage yearly.

3. Plug it into a normal, grounded 110-volt AC outlet.

Warning: Improper use of the heater cord or an extension cord can damage the cord and may result in overheating and fire.

  • Plug the cord into a three-prong electrical utility receptacle that is protected by a ground fault detection function. An ungrounded outlet could cause an electric shock.
  • Use a weatherproof, heavy-duty, 15 amp-rated extension cord if needed.

    Failure to use the recommended extension cord in good operating condition, or using a damaged heater or extension cord, could make it overheat and cause a fire, property damage, electric shock, and injury.

  • Do not operate the vehicle with the heater cord permanently attached to the vehicle. Possible heater cord and thermostat damage could occur.
  • While in use, do not let the heater cord touch vehicle parts or sharp edges. Never close the hood on the heater cord.
  • Before starting the vehicle, unplug the cord, reattach the cover to the plug, and securely fasten the cord.

    Keep the cord away from any moving parts.

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.

Retained Accessory Power (RAP)

These vehicle accessories can be used for up to 10 minutes after the engine is turned off:

  • Infotainment System
  • Power Windows
  • Sunroof (If Equipped)
  • Auxiliary Power Outlet

Power to the Infotainment system will continue to operate for up to 10 minutes or until the driver door is opened.

Power to the power windows and sunroof will continue to operate for up to 10 minutes or until any door is opened.

All of these features will work when the ignition is on or in ACC/ ACCESSORY.

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