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.

Footnotes — Maintenance Schedule Additional Required Services — Severe

    See also:

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    How to Add Coolant to the Recovery Tank
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    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. ...