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Home >> Hummer >> 2008 >> H3 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 297 (Engine Control System & Fuel System - 2.9L - Introduction, Service & Repair) >> Repair Instructions >> Spark Plug Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2009 GMC Canyon and 2009 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the ignition coils. Refer to Ignition Coil Replacement .
  2. WARNING: Wear safety glasses when using compressed air, as flying dirt particles may cause eye injury.
    CAUTION: Clean the spark plug recess area before removing the spark plug. Failure to do so could result in engine damage because of dirt or foreign material entering the cylinder head, or by the contamination of the cylinder head threads. The contaminated threads may prevent the proper seating of the new plug. Use a thread chaser to clean the threads of any contamination.
    Fig 1: View Of Spark Plugs
    GM1361734Courtesy of GENERAL MOTORS CORP.
  3. Clean the spark plug recesses with low pressure air.
  4. CAUTION: Allow the engine to cool before removing the spark plugs. Attempting to remove the spark plugs from a hot engine may cause the plug threads to seize, causing damage to cylinder head threads.
  5. Remove the spark plugs from the cylinder head.
  6. Inspect the spark plugs. Refer to Spark Plug Inspection .