GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 GMC Sierra Denali 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Spark Plug Replacement

Removal Procedure

    Object Number: 14824 Size: SH
  1. Remove the spark plug wire. Refer to Spark Plug Wire Replacement .
  2. Loosen the spark plug 1 or 2 turns.
  3. Brush or using compressed air, blow away any dirt from around the spark plug.
  4. Remove the spark plug.

    5. If removing more than one plug, place each plug in a tray marked with the corresponding cylinder number.

Installation Procedure

    Object Number: 14824 Size: SH
  1. Correctly position the spark plug washer.
  2. Inspect the spark plug gap. Adjust the gap as needed.

    3. Specification
    Spark plug gap: 1.016 mm (0.040 in)

    Notice: Refer to Fastener Notice in the Preface section.

  3. Hand start the spark plug in the corresponding cylinder.
  4. Tighten the spark plug.

    5. Tighten

        • Tighten the plug to 15 N·m (11 lb ft) for used heads.
        • Tighten the plug to 20 N·m (15 lb ft) for NEW heads.
  5. Install the spark plug wire. Refer to Spark Plug Wire Replacement .