GMC Duramax 3.0L, Supplement Manual, Page: 60 / 71

Chevrolet/GMC 3.0L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13336148) - 2020 - CRC - 9/5/19
Service and Maintenance 59
Maintenance Schedule
Additional Required
Services - Severe
12
000
km/7,500
mi
24
000
km/15,000
mi
36
000
km/22,500
mi
48
000
km/30,000
mi
60
000
km/37,500
mi
72
000
km/45,000
mi
84
000
km/52,500
mi
96
000
km/60,000
mi
108
000
km/67,500
mi
120
000
km/75,000
mi
132
000
km/82,500
mi
144
000
km/90,000
mi
156
000
km/97,500
mi
168
000
km/105,000
mi
180
000
km/1
12,500
mi
192
000
km/120,000
mi
204
000
km/127,500
mi
216
000
km/135,000
mi
228
000
km/142,500
mi
240
000
km/150,000
mi
Perform Required Services. Check engine oil
level and oil life percentage. Change engine oil
and filter, if needed. Check engine air filter life per-
centage and status. Change engine air filter,
if needed.
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
If the vehicle is not equipped with the engine air
filter life system, 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 oil pump belt. (4)
@
Replace fuel filter. (5)
@ @ @ @ @
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.
See
Engine Air Cleaner/Filter 0 41 .
(2) Or every five years, whichever
comes first. See Cooling System
(Engine) 0 42 or
Cooling System (Turbocharger)
0 46 .
(3) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage;
replace, if needed.
(4) Or every 15 years, whichever
comes first.