GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra Classic - 2WD 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 Spark Plug Wire Replacement

Removal Procedure

    Object Number: 843846 Size: SH
  1. Disconnect the spark plug wire at the spark plug.
    2. • Twist the spark plug wire 1/2 turn.
    • Pull only on the boot in order to remove the wire from the 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 wire from the ignition coil.

Installation Procedure

    Object Number: 843846 Size: SH
  1. Install the spark plug wire at the ignition coil.
  2. Install the spark plug wire to the spark plug.
  3. Inspect the wire for proper installation:
    4. 3.1. Push sideways on the boot in order to inspect the seating.
    3.2. Reinstall any loose boot.