GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 DeVille 🢒 Engine 🢒 Engine Electrical 🢒 Ignition Coil Replacement - Bank 1

Removal Procedure

    Object Number: 1283865 Size: SH
  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.
  2. Remove the ignition coil cover from the cam cover by lifting straight up, if equipped.
  3. Disconnect the secondary air injection (AIR) vent solenoid electrical connector, if necessary, to gain access to the individual coil being serviced.
  4. Remove the AIR check valve, if necessary, to gain access to the individual coil being serviced. Refer to Secondary Air Injection Shutoff Valve Replacement - Bank 1 .
  5. Disconnect the ignition coil wiring harness electrical connector from the coil that needs to be replaced.
  6. Remove the ignition coil retaining bolt.
  7. Carefully remove the ignition coil.

    8. Object Number: 927822 Size: SH
  8. If removal of all the coils are necessary, disconnect the main coil wiring harness at the cam cover.

    9. Object Number: 928257 Size: SH
  9. Remove the coil assembly retaining bolts and studs.
  10. Carefully remove the ignition coil assembly.

Installation Procedure

    Object Number: 928257 Size: SH
  1. Carefully install the ignition coil assembly. Ensure that the spark plug seals are in position.

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the coil assembly retaining bolts and studs.

    3. Tighten
    Tighten the coil assembly retaining bolts and studs to 10 N·m (89 lb in).


    Object Number: 927822 Size: SH
  3. Connect the main coil wiring harness at the cam cover.

    4. Object Number: 1283865 Size: SH

    Important: Ensure that the spark plug seals are in place when installing the ignition coil.

  4. Install the ignition coil.
  5. Install the ignition coil retaining bolt.

    6. Tighten
    Tighten the ignition coil retaining bolt to 10 N·m (89 lb in).

  6. Connect the ignition coil electrical connector.
  7. Connect the AIR vent solenoid electrical connector, if disconnected during disassembly.
  8. Install the AIR check valve, if removed during disassembly. Refer to Secondary Air Injection Shutoff Valve Replacement - Bank 1 .
  9. Install the ignition coil cover to the cam cover, if equipped.
  10. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.