Sierra Classic 3500 4WD V8-8.1L (2007)
Ignition Coil: Service and Repair
IGNITION COIL REPLACEMENT
REMOVAL PROCEDURE
1. Disconnect the spark plug wire from the ignition coil.
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Twist the spark plug boot 1/2 turn.
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Pull only on the boot in order to remove the wire from the ignition coil.
2. Disconnect the ignition coil electrical connector.
3. Remove the ignition coil bolts.
4. Remove the ignition coil.
INSTALLATION PROCEDURE
NOTE: This component is initially installed using a self-tapping bolt. Care should be taken when removing and/or installing the self-tapping bolt.
Failure to use care when removing and/or installing the self-tapping bolt can lead to damage and unnecessary replacement of the self-tapping bolt
and/or the component the self-tapping bolt is threaded into.
1. Install ignition coil.
NOTE: Refer to Fastener Notice.
2. Install the ignition coil bolts.
Tighten the bolts to 12 N.m (106 lb in).