Spark Plug Replacement

Fig 1: Spark Plug

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
CAUTION: This engine has aluminum cylinder heads. Do not remove the spark plugs from a hot engine, allow it to cool first. Removing the spark plugs from a hot engine may cause spark plug thread damage or cylinder head damage. Preliminary Procedure Remove the ignition coils. Refer to Ignition Coil Replacement
1	Ignition Coil Fasteners (Qty: 4) CAUTION: Refer to Component Fastener Tightening Caution . Procedure If reusing spark plugs, Refer to Spark Plug Inspection NOTE: If using new spark plugs, do not attempt to check gap. Plugs come pre-gapped. Tighten 20 N.m (15 lb in)