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.
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HOMESERVICE MANUALSCHEVROLET1985ASTRO VAN M L4-151 2.5LREPAIR AND DIAGNOSISDIAGRAMSELECTRICAL DIAGRAMSPOWERTRAIN MANAGEMENTSYSTEM DIAGRAMELECTRONIC/POWERTRAIN CONTROL MODULE (ECM/PCM)
1985 Chevrolet Astro Van M L4-151 2.5L
Electronic/Powertrain Control Module (ECM/PCM)
1985 Chevrolet Astro Van M L4-151 2.5LSECTION Electronic/Powertrain Control Module (ECM/PCM)
ECM Wiring Schematic (Part 1 of 2):
ECM Wiring Schematic (Part 2 of 2):
RENDER: 1.0x
NO RELATED
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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.