| Air Filter |
| Normal Service |
24 |
30,000 |
| Severe Service |
|
15,000 |
| Compressed Natural Gas (CNG) |
| Fuel Cylinder Test |
|
|
| Coolant |
36 |
|
| Engine Oil |
| Normal Service |
6 |
7500 |
| Severe Service |
|
3000 |
| Engine Oil Filter |
| Normal Service |
12 |
15,000 |
| Severe Service |
|
6000 |
| PCV Valve |
| Normal Service |
48 |
60,000 |
| Severe Service |
|
30,000 |
| Spark Plugs |
| Normal Service |
|
100,000 |
| Severe Service |
|
75,000 |
| Spark Plug Wires |
| Normal Service |
|
100,000 |
| Severe Service |
|
75,000 |
| Auto. Trans. Fluid, Filter & |
| Band Adjustment |
|
|
| Power Transfer Unit |
| Fluid (AWD) |
|
12,000 |
| Rear Differential & Overrunning |
| Clutch Fluid (AWD) |
|
21,000 |