Installation Procedure

NOTE: Use only the spark plugs specified for use in the vehicle. Do not install spark plugs that are either hotter or colder than those specified for the vehicle. Installing spark plugs of another type can severely damage the engine.

NOTE: Check the gap of all new and reconditioned spark plugs before installation. The pre-set gaps may have changed during handling. Use a round feeler gage to ensure an accurate check. Installing the spark plugs with the wrong gap can cause poor engine performance and may even damage the engine.

Measure the spark plug gap on the spark plugs to be installed. Compare the measurement to the gap specifications, correct as necessary.

NOTE: Be sure that the spark plug threads smoothly into the cylinder head and the spark plug is fully seated. Use a thread chaser, if necessary, to clean threads in the cylinder head. Cross-threading or failing to fully seat the spark plug can cause overheating of the plug, exhaust blow-by, or thread damage.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the spark plugs to the cylinder heads.
Tighten: Tighten the spark plugs to 25 N.m (18 lb ft).

Fig 1: Removing/Installing Ignition Control Module

Courtesy of GENERAL MOTORS CORP.

Install the ignition Modules. Refer to Ignition Control Module Replacement - Bank 1 and Ignition Control Module Replacement - Bank 2 .
Install the Intake Manifold Runners. Refer to Intake Runner Replacement (Front) or Intake Runner Replacement (Rear) in Engine Mechanical.