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 Chevrolet APVFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location | |
|---|---|---|
| Audio Alarm Module | Under right of dash, on convenience center. See Figure . | |
| Cruise Control Module | Behind left side of dash, left of steering column. | |
| Daytime Running Lights (DRL) Module | Behind left side of dash, left of steering column. | |
| Electronic Control Module (ECM) | Under right side of dash, behind convenience center. See Figure . | |
| Electronic Spark Control Module | Under right side of dash, behind convenience center. See Figure . | |
| Remote Dimmer Module | Behind dash, left of steering column. | |
| Wiper Motor Module | ||
| Front | In engine compartment, above right wheelwell. | |
| Rear | Behind panel in rear liftgate. | |
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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