Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Isuzu Ascender 2WD L6-4.2LFACTORY OEM SERVICE PROCEDURE
Maintenance: Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Service or Charge | ||||
| Normal Service | ||||
| Oil & Filter Service | 0.4 | 0.0 | C | |
| 7,500 Miles | 0.3 | 0.0 | C | |
| 15,000 Miles | 0.7 | 0.0 | C | |
| 22,500 Miles | 0.3 | 0.0 | C | |
| 30,000 Miles | 1.6 | 0.0 | C | |
| 37,500 Miles | 0.3 | 0.0 | C | |
| 45,000 Miles | 0.7 | 0.0 | C | |
| 50,000 Miles | 0.5 | 0.0 | C | |
| 52,500 Miles | 0.3 | 0.0 | C | |
| 60,000 Miles | 1.6 | 0.0 | C | |
| 67,500 Miles | 0.3 | 0.0 | C | |
| 75,000 Miles | 0.7 | 0.0 | C | |
| 82,500 Miles | 0.3 | 0.0 | C | |
| 90,000 Miles | 1.6 | 0.0 | C | |
| 97,500 Miles | 0.3 | 0.0 | C | |
| 100,000 Miles | 3.7 | 0.0 | B | |
| 105,000 Miles | 0.7 | 0.0 | C | |
| 112,500 Miles | 0.3 | 0.0 | C | |
| 120,000 Miles | 1.6 | 0.0 | C | |
| 127,500 Miles | 0.3 | 0.0 | C | |
| 135,000 Miles | 0.7 | 0.0 | C | |
| 142,500 Miles | 0.3 | 0.0 | C | |
| 150,000 Miles | 2.7 | 0.0 | C | |
| Note | ||||
| With Skid Plate, Add | 0.4 | 0.0 | C |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.