GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Sierra - 4WD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Ignition Coil Replacement

Removal Procedure

    Object Number: 1876017 Size: SH
  1. Remove the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement .
  2. Disconnect the chassis fuel feed pipe (1) quick connect fitting from the engine fuel feed pipe. Refer to Metal Collar Quick Connect Fitting Service .

    3. Object Number: 1876492 Size: SH
  3. Disconnect the engine wiring harness electrical connector from the manifold absolute pressure (MAP) sensor.
  4. Disconnect the engine wiring harness electrical connector (1) from the evaporative emission (EVAP) canister purge solenoid valve.

    5. Object Number: 1876869 Size: SH
  5. Remove the engine wiring harness connector position assurance (CPA) retainer at the fuel meter body.
  6. Disconnect the engine wiring harness electrical connector (1) from the fuel meter body.

    7. Object Number: 1876870 Size: SH
  7. Remove the engine wiring harness clips (1, 2) from the engine harness brackets.

    8. Object Number: 1876871 Size: SH
  8. Remove the engine wiring harness rear bracket bolts and bracket.

    9. Object Number: 1876875 Size: SH

    Important: Note the routing of the spark plug wires prior to disconnecting the wires from the ignition coil.

  9. Disconnect the spark plug wires (1, 2) from the ignition coil.
  10. Reposition the spark plug wires out of the way.

    11. Object Number: 1876873 Size: SH
  11. Disconnect engine wiring harness electrical connector (7) from the ignition coil.
  12. Reposition the engine wiring harness branches out of the way as required.

    13. Object Number: 1876876 Size: SH
  13. Remove the ignition coil bolts and coil from the bracket.

    14. Object Number: 1876878 Size: SH
  14. If required, remove the ignition coil bracket bolts and bracket.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1876878 Size: SH
  1. If required, position the ignition coil bracket to the lower intake manifold and install the bolts.

    2. Tighten
    Tighten the bolts to 12 N·m (106 lb in).


    Object Number: 1876876 Size: SH
  2. Place the ignition coil on top of the bracket and install the bolts.

    3. Tighten
    Tighten the bolts to 12 N·m (106 lb in).


    Object Number: 1876873 Size: SH
  3. Position the engine wiring harness branches as required.
  4. Connect engine wiring harness electrical connector (7) to the ignition coil.

    5. Object Number: 1876875 Size: SH
  5. Position the spark plug wires to the ignition coil.
  6. Connect the spark plug wires (1, 2) to the ignition coil as noted during removal.

    7. Object Number: 1876871 Size: SH
  7. Place the engine wiring harness rear bracket onto the upper intake manifold and install the bolts.

    8. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 1876870 Size: SH
  8. Install the engine wiring harness clips (1, 2) to the engine harness brackets.

    9. Object Number: 1876869 Size: SH
  9. Connect the engine wiring harness electrical connector (1) to the fuel meter body.
  10. Install the engine wiring harness CPA retainer at the fuel meter body.

    11. Object Number: 1876492 Size: SH
  11. Connect the engine wiring harness electrical connector (1) to the EVAP canister purge solenoid valve.
  12. Connect the engine wiring harness electrical connector to the MAP sensor.

    13. Object Number: 1876017 Size: SH
  13. Connect the chassis fuel feed pipe (1) quick connect fitting to the engine fuel feed pipe. Refer to Metal Collar Quick Connect Fitting Service .
  14. Install the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement .