GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Yukon XL - 4WD 🢒 Engine 🢒 Engine Controls - 8.1L 🢒 Spark Plug Wire Replacement

Removal Procedure

    Object Number: 470666 Size: SH
  1. Disconnect the spark plug wire at each spark plug.
    2. • Twist each spark plug wire 1/2 turn.
    • Pull only on the boot in order to remove the wire from each spark plug.
  2. Disconnect the spark plug wire from the ignition coil.
    3. • Twist each spark plug boot 1/2 turn.
    • Pull only on the boot in order to remove the wires from the ignition coil.

Installation Procedure

    Object Number: 470666 Size: SH
  1. Install the spark plug wires at the ignition coil.
  2. Install the spark plug wire to each spark plug.
  3. Inspect the wires for proper installation:
    4. • Push sideways on each boot in order to inspect the seating.
    • Install any loose boot.