Footnotes — Maintenance Schedule Additional Required Services — Normal
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:
Purposeful technology
Comprehensive connectivity is enabled by OnStar's remote vehicle access,
which makes keeping tabs on the vehicle a breeze from anywhere with a smart
phone. Highlights include:
Passive entry
Hea ...
How to Check Automatic Transmission
Fluid (3.9L Engine)
Because this operation can be a little difficult, you may
choose to have this done at the dealer/retailer service
department.
If you do it yourself, be sure to follow all the instructions
here, ...
Compass Messages
CAL
This message is displayed when the compass needs to be calibrated.
See Compass .
– – – Three dashes will be displayed if the compass needs service. See your dealer for service. ...
