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Additional Required Services (Gasoline Engine)
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 Engine Supplement.
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
(41 500)
50,000
(83 000)
75,000
(125 000)
100,000
(166 000)
125,000
(207 500)
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
(Gasoline Engines) on page 5-25.
•••
6-speed manual transmission only:
Change clutch fluid. See footnote (l).
• •••••
Allison Transmission
®
only: Change
automatic transmission fluid and filter
(severe service). See footnote (m).
• •••••
Allison Transmission
®
only: Change
automatic transmission fluid and filter
(normal service).
•••
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