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:
Certification Label
Label Example
A vehicle-specific Certification label is attached to the driver side center pillar (B-pillar).
The label tells the gross weight capacity of the vehicle, called the Gross Vehicle Weig ...
Lockout Protection
If the key is in the ignition and the power door lock switch
is used to lock the doors, all doors will lock and then the
driver door will unlock. It is always recommended that
the ignition key i ...
Finish Care
Occasional waxing or mild polishing of your
vehicle by hand may be necessary to remove
residue from the paint finish. You can get
GM-approved cleaning products from your dealer.
If your vehicle ha ...
