See also:

How to Check Power Steering Fluid
Notice: Extremely small amounts of contamination can cause steering system damage and cause it to not work properly. Do not allow contaminants to contact the fluid side of the reservoir cap/ dipstick ...

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...

Key and Lock Messages
REPLACE BATTERY IN REMOTE KEY This message displays when the battery in the Remote Keyless Entry (RKE) transmitter needs to be replaced. ...