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.
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. | · | · | · | · | · | · |
Replace engine air cleaner filter. See Engine Air Cleaner/Filter . |
| · |
| · |
| · |
Change automatic transmission fluid and filter (severe service). See footnote (h). |
| · |
| · |
| · |
Change automatic transmission fluid and filter (normal service). |
|
|
| · |
|
|
Four-wheel drive: Change transfer case fluid (severe service). See footnotes (o) and (p). |
| · |
| · |
| · |
Four-wheel drive: Change transfer case fluid (normal service). See footnote (o). |
|
|
| · |
|
|
Replace spark plugs and inspect spark plug wires. An Emission Control Service. |
|
|
| · |
|
|
Engine cooling system service (or every five years, whichever occurs first). An Emission Control Service. See footnote (i). |
|
|
|
|
| · |
Inspect engine accessory drive belt. An Emission Control Service. See footnote (n). |
|
|
|
|
| · |
Inspect evaporative control system. An Emission Control Service. See footnotes † and (k). |
| · |
| · |
| · |
