Additional Required Services
This maintenance section applies to vehicles with a gasoline engine. If your vehicle has a diesel engine, see the
maintenance schedule section in the DURAMAX
®
Diesel manual.
The following services should be performed at the first maintenance service (I or II) after the indicated miles
(kilometers) shown for each item.
Additional Required Services
Service and Miles (Kilometers)
25,000
(40 000)
50,000
(80 000)
75,000
(120 000)
100,000
(160 000)
125,000
(200 000)
150,000
(240 000)
Inspect fuel system for damage or leaks. • •••••
Inspect exhaust system for loose or
damaged components.
• •••••
Vehicles without a filter restriction
indicator: Replace engine air cleaner
filter. See Engine Air Cleaner/Filter on
page 5-19.
•••
Change automatic transmission fluid and
filter (severe service).
See footnote (h).
•••
Change automatic transmission fluid and
filter (normal service).
•
Four-wheel drive only: Change transfer
case fluid (extreme duty service). See
footnotes (g) and (l).
• •••••
6-7
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