Sierra 1500 4WD V6-4.3L (2008)
Spark Plug: Service and Repair
Spark Plug Replacement
Removal Procedure
1. Remove the appropriate spark plug wire boot(s) (2) from the spark plug. (left side shown, right similar).
1. Twist the spark plug boot 1/2 turn.
2. Pull ONLY on the spark plug boot or use a tool designed for this purpose in order to remove the spark plug wire boot from the spark plug.
2. Loosen the spark plug 1 or 2 turns. (left side shown, right similar).
3. Brush or air blast away any dirt from around the spark plug.
4. Remove the spark plug. If removing more than 1 plug, place each plug in a tray marked with the corresponding cylinder number.
Installation Procedure