Chevrolet Volt 2013 Owner's Manual page 336

11-6 Service and Maintenance
Footnotes Maintenance
Schedule Additional Required
Services Normal
(1) Or every four years, whichever
comes first.
(2) Or every five years, whichever
comes first. See Cooling System
(Engine) on page 10 14 or Cooling
System (High Voltage Battery) on
page 10 15 or Cooling System
(Power Electronics and Charger
Modules) on page 10 16.
(3) Or every 10 years, whichever
comes first.
(4) Inspect for fraying, excessive
cracking, or damage; replace,
if needed.