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 MANUALSCADILLAC1998SEVILLE SLS V8-4.6L VIN YREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMIGNITION CONTROL MODULESERVICE AND REPAIRIGNITION CONTROL MODULE REPLACEMENT (COILS)
1998 Cadillac Seville SLS V8-4.6L VIN Y
Ignition Control Module Replacement (Coils)
1998 Cadillac Seville SLS V8-4.6L VIN YSECTION Ignition Control Module Replacement (Coils)
Ignition Control Module Replacement (Coils)
Removal Procedure
1. Remove the spark plug wires for corresponding ignition coils at ignition control module assembly.
2. Remove the ignition coil retaining bolts (2 per coil).
3. Remove the coil from the IC module assembly.
Installation Procedure
Notice: Refer to Fastener Notice in Service Precautions.
1. Install the ignition coil to the IC module assembly with the 2 retaining bolts.
Tighten the 2 retaining bolts to 3.5 N.m (30 lb in).
2. Install the spark plug wires at the IC module assembly.
Removal Procedure
1. Remove the spark plug wires for corresponding ignition coils at ignition control module assembly.
2. Remove the ignition coil retaining bolts (2 per coil).
3. Remove the coil from the IC module assembly.
Installation Procedure
Notice: Refer to Fastener Notice in Service Precautions.
1. Install the ignition coil to the IC module assembly with the 2 retaining bolts.
Tighten the 2 retaining bolts to 3.5 N.m (30 lb in).
2. Install the spark plug wires at the IC module assembly.
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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.