GMC duramax diesel 2016 Supplement Manual page 121

120 Service and Maintenance
Maintenance Schedule
Additional Required
Services - Severe
Perform Required Services. Check engine oil
level and oil life percentage. Change engine oil
and filter, if needed.
Replace engine air cleaner filter. (1)
Change automatic transmission fluid and filter.
Drain and fill engine cooling system. (2)
Visually inspect accessory drive belts. (3)
Replace timing belt. (2.8L 4-Cylinder Engine)
Replace fuel filter. (6.6L 8-Cylinder Engine) (4)
Replace fuel filter. (2.8L 4-Cylinder Engine) (4)
Footnotes Maintenance
Schedule Additional Required
Services - Severe
(1) Or every four years, whichever
comes first. If driving in dusty
conditions, inspect the filter at each
oil change or more often as needed.
(2) Or every five years, whichever
comes first. See Cooling
System 0 104.
(3) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage;
replace, if needed.
(4) Or every two years, or when the
CHANGE FUEL FILTER message in
the Driver Information Center (DIC)
comes on, whichever comes first.
The fuel filter may need to be
replaced more often based on
biodiesel usage, when driving in
climates with excessive dust,
or when off-road driving or towing a
trailer for extended periods.