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.
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) |
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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 . |
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Allison Transmission® only: Change automatic transmission fluid and external transmission filter (severe service). See footnote (m). | · | · | · | · | · | · |
Allison Transmission® only: Change automatic transmission fluid and external transmission filter (normal service). |
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Except Allison Transmission®: Change automatic transmission fluid and filter (severe service). See footnote (h). |
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Except Allison Transmission®: Change automatic transmission fluid and filter (normal service). |
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Four-wheel drive with automatic transfer case only: Change transfer case fluid. See footnote (g). |
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Inspect evaporative control system. An Emission Control Service. See footnotes † and (k). |
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Replace spark plugs and inspect spark plug wires. An Emission Control Service. |
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Change manual transmission fluid. |
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Engine cooling system service (or every five years, whichever occurs first).An Emission Control Service. See footnote (i). |
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Inspect engine accessory drive belt. An Emission Control Service. See footnote (q). |
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