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 (ASSEMBLY)
1998 Cadillac Seville SLS V8-4.6L VIN Y
Ignition Control Module Replacement (Assembly)
1998 Cadillac Seville SLS V8-4.6L VIN YSECTION Ignition Control Module Replacement (Assembly)
Ignition Control Module Replacement (Assembly)
Removal Procedure
1. Remove the spark plug wires at the ignition control module assembly.
2. Remove the four electrical connectors at the ignition control module.
3. Remove the four bolts (4 and 8) retaining the IC module assembly to rear camshaft cover (5).
4. Remove the IC module assembly from the vehicle.
5. Remove the ignition coils from the IC module assembly (1, 2, 3, and 7).
6. Remove the IC module from the assembly bracket (6).
Installation Procedure
1. Install the IC module to the assembly bracket (6).
2. Install the ignition coils to the IC module assembly.
Notice: Refer to Fastener Notice in Service Precautions.
3. Position the IC module assembly on the rear camshaft cover and install the four retaining bolts (4 and 8).
Tighten the 4 retaining bolts to 12 N.m (106 lb in).
4. Install the four electrical connectors at the IC module assembly.
Removal Procedure
1. Remove the spark plug wires at the ignition control module assembly.
2. Remove the four electrical connectors at the ignition control module.
3. Remove the four bolts (4 and 8) retaining the IC module assembly to rear camshaft cover (5).
4. Remove the IC module assembly from the vehicle.
5. Remove the ignition coils from the IC module assembly (1, 2, 3, and 7).
6. Remove the IC module from the assembly bracket (6).
Installation Procedure
1. Install the IC module to the assembly bracket (6).
2. Install the ignition coils to the IC module assembly.
Notice: Refer to Fastener Notice in Service Precautions.
3. Position the IC module assembly on the rear camshaft cover and install the four retaining bolts (4 and 8).
Tighten the 4 retaining bolts to 12 N.m (106 lb in).
4. Install the four electrical connectors at the IC module assembly.
RENDER: 1.0x
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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.