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 MANUALSCHEVROLET1986C 20 P/U 2WD L6-292 4.8LREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - IGNITION SYSTEMIGNITION CONTROL MODULESERVICE AND REPAIR
1986 Chevrolet C 20 P/U 2WD L6-292 4.8L
Ignition Control Module: Service and Repair
1986 Chevrolet C 20 P/U 2WD L6-292 4.8LSECTION Service and Repair
Fig. 13 Distributor component identification:
Fig. 14 Ignition module harness identification:
1. Disconnect wiring harness connector at side of distributor cap and remove distributor cap.
2. Remove rotor and disconnect wires from module terminals.
3. Remove two mounting screws and remove module, Fig. 13. Two types of HEI. wiring harness are used, Fig. 14. The second type is a wiring harness, connector and capacitor which is serviced as an assembly.
4. Reverse procedure to install. Prior to installation, coat bottom of new module with dielectric grease (furnished with new module) to aid in heat transfer into distributor housing. Failure to apply grease will cause excessive heat at module and premature module failure.
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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.