Spark Plug: Service and Repair

Spark Plug Replacement

Removal Procedure





1. If replacing the right side spark plug(s), remove the right front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Right Side (Chevrolet) (Service and Repair)Front Wheelhouse Liner Replacement - Right Side (GMC) (Service and Repair) , and remove the right side plug(s) through the wheel opening.

Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.


The High Voltage Disabling procedure will perform the following tasks:


* Identify how to disable high voltage.

* Identify how to test for the presence of high voltage.

* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.


Failure to follow the procedures exactly as written may result in serious injury or death.


2. If replacing the right side spark plug(s), perform the service disconnect. Refer to High Voltage Disabling (High Voltage Disabling) .
3. Remove the spark plug wire from the spark plug.

1. Twist the spark plug wire boot a 1/2 turn.
2. Pull only on the boot in order to remove the wire from the spark plug.





4. Brush or using compressed air, blow away any dirt from around the spark plug.
5. Remove the spark plug.
If removing more than one plug, place each plug in a tray marked with the corresponding cylinder number.



Installation Procedure





1. Correctly position the spark plug washer.
2. Inspect the spark plug gap. Adjust the gap as needed. Refer to Ignition System Specifications (Specifications)
3. Hand start the spark plug in the corresponding cylinder.
Caution: Refer to Fastener Caution (Fastener Caution) .
4. Tighten the spark plug.

Tighten the plug to 15 Nm (11 lb ft).





5. Install the spark plug wire to the spark plug.
6. Inspect the spark plug wire for proper installation:

1. Push sideways on each boot in order to inspect the seating.
2. Reinstall any loose boot.

7. If a right side spark plug(s) was replaced, install the right front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Right Side (Chevrolet) (Service and Repair)Front Wheelhouse Liner Replacement - Right Side (GMC) (Service and Repair) .
8. If a right side spark plug(s) was replaced, perform the service reconnect. Refer to High Voltage Enabling (High Voltage Enabling) .