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.
1990 Isuzu Impulse AutomaticFACTORY OEM SERVICE PROCEDURE
Replacement Intervals
REPLACEMENT INTERVALS
| Component | Interval (Miles) | |||
|---|---|---|---|---|
| Air Filter | 30,000 | |||
| Automatic Transaxle Fluid | ||||
| Impulse | 30,000 | |||
| Automatic Transmission Fluid | ||||
| Pickup & Trooper | (1) | |||
| Coolant | 30,000 | |||
| Differential Oil | 15,000 | |||
| Manual Transaxle Oil | ||||
| Impulse | 30,000 | |||
| Manual Transmission Fluid | ||||
| Amigo, Pickup & Trooper | 15,000 | |||
| Oil & Filter | 7500 | |||
| Oxygen Sensor | ||||
| Amigo, Pickup & Trooper 2.6L | 90,000 | |||
| Spark Plugs | 30,000 | |||
| Timing Belt | 60,000 | |||
| Transfer Case Oil | 15,000 | |||
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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.
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