GM 12621258
Spark Plug

You need to start this replacement process by twisting the plug wire boot by 1/2 turn then pull only on the boot. A brush or compressed air should be used to clean the Spark Plug area from dirt before performing the next step. Each Spark Plug should be placed in its designated cylinder-tray before moving on to the next plug replacement. The correct position of the Spark Plug washer must be established during installation while you check and adjust the Spark Plug gap if needed. Use hand power to position the Spark Plug in its respective cylinder before tightening it to 15 n.m (11 lb ft). To complete the installation you should fix the Spark Plug wire and check its correct placement by applying pressure on each boot to ensure proper contact before reinstalling any loose boot.

The first step for right side Spark Plug(s) replacement requires removal of the right front wheelhouse liner and wheel opening access for the Spark Plug(s). The first step of any high voltage servicing procedure requires running the high voltage disabling procedure while utilizing personal protection equipment (PPE) to ensure safe operations and prevent severe harm or death. The required procedure mandates personnel to learn about voltage disabling methods while conducting voltage tests and understanding what specific scenarios equate to permanent voltage presence. Begin by disconnecting the service and afterward remove the Spark Plug wire through a 1/2 turn twist motion on the boot while pulling only at the boot. Before taking out the Spark Plug you should clean away dirt surrounding it by using either a brush or compressed air. Single plugs should be placed in trays according to cylinder numbers when multiple plug removal tasks occur. Place the Spark Plug washer correctly during installation after inspecting the Spark Plug gap and adjusting it if necessary and starting the Spark Plug by hand into the designated cylinder. The technician should install the Spark Plug while applying 15 nm (11 lb ft) torque and replace the Spark Plug wire by applying pressure sideways on each boot to confirm seating then replacing loose boot positions. The procedure requires reinstallation of the right front wheelhouse liner along with performing the service reconnect after replacing spark plugs on the right side.

The right front wheelhouse liner should be removed first so spark plugs can be reached through the wheel opening. All high voltage component service and connection work requires execution of the high voltage disabling procedure along with personal protection equipment use and correct procedures to stop serious injury or death. The procedure requires workers to learn how to disable high voltage and follow tests and evaluate which conditions cause high voltage to always exist. Start by conducting the service disconnect followed by removing the Spark Plug wire through a half-turn twist on the boot before pulling only from the boot itself. Clean dirt from around the Spark Plug by brushing or blowing compressed air and remove the plug to a tray labeled with cylinder numbers of multiple plug removals. Insert the Spark Plug washer properly after inspecting the gap and adjusting it as necessary before hand-starting the plug into the target cylinder. Secure the Spark Plug with 15 nm (11 lb ft) torque while reattaching the Spark Plug wire. After checking that each boot seats correctly by pulling sideways you should reinstall any loose.bootstrap. Replacement of any right side Spark Plug(s) requires right front wheelhouse liner reinstallation before conducting the service reconnect.

Place each spark plug in a tray marked with the corresponding cylinder number.

Tighten them to 18 Nm (13 lb ft).

Install the ignition coils.

Place each in a tray marked with the corresponding cylinder number.

Install the spark plug into the cylinder head by hand, ensuring to tighten it to 15 Nm (11 lb ft).