Installation Procedure

NOTE: It is important to check the gap of all new and reconditioned spark plugs before installation. Pre-set gaps may have changed during handling. Use a round wire feeler gauge to be sure of an accurate check, particularly on used plugs. Installing plugs with the wrong gap can cause poor engine performance and may even damage the engine.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.

Fig 1: Removing/Installing Spark Plugs

Courtesy of GENERAL MOTORS CORP.

Gap the NEW spark plugs. Refer to Ignition System Specifications .
Install the spark plugs.
Tighten: Tighten the nuts to 15 Nm (11 lb ft).

Fig 2: View Of Spark Plug Wire Assembly

Courtesy of GENERAL MOTORS CORP.

Install the right side spark plug wires to the spark plugs, if required.
Rotate the engine to the original position. Refer to ROTATING THE ENGINE FOR SERVICE ACCESS .

Fig 3: View Of Left Spark Plug/Coil Harness

Courtesy of GENERAL MOTORS CORP.

Install the left side spark plug wires to the spark plugs.
Install intake manifold cover, if required. Refer to INTAKE MANIFOLD COVER REPLACEMENT .
Install air cleaner outlet duct, if required. Refer to Air Cleaner Outlet Duct Replacement .