See also:

Vehicle and Power Issues
OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not o ...

Engine Air Cleaner/Filter
See Engine Compartment Overview  for the location of the engine air cleaner/filter. ...

Engine Coolant Heater
Your vehicle may have an engine coolant heater. In very cold weather, 0°F (−18°C) or colder, the engine coolant heater can help. You will get easier starting and better fuel economy durin ...