See also:

Rear Window Defogger
The rear window defogger uses a warming grid to remove fog from the rear window. (Rear Window Defogger): Press to turn the rear window defogger on or off. An indicator light below the button ...

Heated Mirrors
The vehicle may have heated mirrors: (Rear Window Defogger): Press to heat the mirrors. See “Rear Window Defogger” under Climate Control Systems  for more information. ...

Engine Oil Additives
Do not add anything to the oil. The recommended oils with the starburst symbol that meet GM Standard GM6094M are all you will need for good performance and engine protection. ...