GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2002 🢒 GMC C Sierra - 2WD 🢒 Body and Accessories 🢒 Body Front End 🢒 Spark Plug Replacement

Removal Procedure

    Object Number: 343699 Size: SH
  1. Remove the engine sight shield, if necessary. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical-4.8L, 5.3L, and 6.0L.
  2. Disconnect the spark plug wire from the spark plug.
    3. • Twist each spark plug wire 1/2 turn.
    • Pull only on the boot in order to remove the wire from the plug.

    Object Number: 14824 Size: SH
  3. Loosen the spark plug 1 or 2 turns.
  4. Brush or air blast away any dirt from around the spark plug.
  5. Remove the spark plug. If removing all the plug at one time, place each plug in a tray marked with the corresponding cylinder numbers.

Installation Procedure

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

    3. Specification
    Spark plug gap: 1.524 mm (0.060 in)

    Notice: Refer to Fastener Notice in the Preface section.

  3. Hand start the spark plug.
  4. Tighten the spark plug.

    5. Tighten

        • For used heads tighten the plug to 15 N·m (11 lb ft).
        • For new aluminum heads tighten the plug to 20 N·m (15 lb ft).
        • For new iron heads, tighten the plug to 30 N·m (22 lb ft).

    Object Number: 343699 Size: SH
  5. Install the spark plug wire to the spark plug.
  6. Inspect the wire for proper installation:
    7. • Push sideways on each boot in order to inspect the seating.
    • Reinstall any loose boot.
  7. Install the engine sight shield, if necessary. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical-4.8L, 5.3L, and 6.0L.