GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2005 🢒 GMC Sierra Denali 🢒 Engine 🢒 Engine Controls - 4.8L, 5.3L, and 6.0L 🢒 Ignition Coil Replacement

Removal Procedure

    Object Number: 344169 Size: SH
  1. If equipped with regular production option (RPO) HP2, disconnect the energy storage box (ESB). Refer to Hybrid Battery Service Disconnect/Connect in Engine Electrical.
  2. Remove the spark plug wire from the ignition coil.

    3. Object Number: 339299 Size: SH
  3. Disconnect the ignition coil electrical connector.

    4. Object Number: 1285626 Size: SH
  4. If equipped with regular production option (RPO) HP2, remove the auxiliary heater water pump bracket bolts.
  5. Remove the auxiliary heater water pump from the studs, and reposition out of the way.

    6. Object Number: 1237061 Size: SH
  6. If equipped with RPO HP2, remove the starter/generator control module (SGCM) cover bolts, and cover.
  7. Remove the 3-phase cable nuts to the SGCM.
  8. Remove the 3-phase cable from the SGCM.

    9. Object Number: 1237062 Size: SH
  9. If equipped with RPO HP2, remove the 3-phase cable bracket nuts (2).
  10. Remove the 3-phase cable bracket (1) from the studs, and reposition the cable and bracket out of the way.

    11. Object Number: 344167 Size: SH
  11. Remove the ignition coil bolts.

    12. Object Number: 339300 Size: SH
  12. Remove the ignition coil.

Installation Procedure

    Object Number: 339300 Size: SH
  1. Install the ignition coil.

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


    Object Number: 344167 Size: SH
  2. Install the ignition coil bolts.

    3. Tighten
    Tighten the bolts to 8 N·m (71 lb in).


    Object Number: 1237062 Size: SH
  3. If equipped with RPO HP2, position the cable (w/bracket) and install the 3-phase cable bracket to the studs.
  4. Install the 3-phase cable bracket nuts (2).

    5. Tighten
    Tighten the nuts to 15 N·m (11 lb ft).


    Object Number: 1237061 Size: SH
  5. If equipped with RPO HP2, install the 3-phase cable to the SGCM.
  6. Install the 3-phase cable nuts to the SGCM.

    7. Tighten
    Tighten the nuts to 9 N·m (80 lb in).

  7. Install the SGCM cover and bolts.

    8. Tighten
    Tighten the bolts to 9 N·m (80 lb in).


    Object Number: 1285626 Size: SH
  8. If equipped with RPO HP2, position the auxiliary heater water pump and install it onto the studs.
  9. Install the auxiliary heater water pump bracket bolts.

    10. Tighten
    Tighten the bolts to 15 N·m (11 lb ft).


    Object Number: 339299 Size: SH
  10. Connect the ignition coil electrical connector.

    11. Object Number: 344169 Size: SH
  11. Install the spark plug wire to the ignition coil.
  12. If equipped with RPO HP2, connect the ESB. Refer to Hybrid Battery Service Disconnect/Connect in Engine Electrical.