Footnotes — Maintenance Schedule Additional Required Services — Severe

a) Check all fuel and vapor lines and hoses for proper hook-up, routing, and condition. Check that the purge valve, if the vehicle has one, works properly. Replace as needed.

b) Or every four years, whichever comes first.

c) Or every five years, whichever comes first. See Cooling System .

d) Or every 10 years, whichever comes first. Inspect for fraying, excessive cracking, or damage; replace, if needed.

    See also:

    Hands-Free Calling
    1. Push . System responds: “OnStar ready.”. 2. Say “Dial.” System responds: “Please say the name or number to call.”. 3. Say the entire number without pausing, including a “1” ...

    Using the Directory Command
    The directory command lists all of the name tags stored by the system. To use the directory command: 1. Press . ► For vehicles without a navigation system, the system responds “Ready,” f ...

    Time and Date Settings
    From the Time and Date Settings screen button, press to display the Time and Date Settings menu. Set Time: Press + or − to increase or decrease the Hours and Minutes displayed on the clock. ...