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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 973 (Engine Controls - 4.8L, 5.3L, & 6.0L (Introduction)) >> Repair Instructions >> Ignition Coil(s) Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. If equipped with regular production option (RPO) HP2, disconnect the energy storage box (ESB). Refer to Energy Storage Box (ESB) Service Disconnect/Connect (5.3L Engine w/RPO HP2) in Engine Electrical.
  2. Remove the spark plug wire from the ignition coil.
    3. Fig 1: View Of Spark Plug Wires At Ignition Coil
    GM344169Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the ignition coil electrical connector.
    4. Fig 2: View of Ignition Coil Harness Connector
    GM339299Courtesy of GENERAL MOTORS CORP.
  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. Fig 3: Auxiliary Heater Water Pump, Bracket & Bolts
    GM1285626Courtesy of GENERAL MOTORS CORP.
  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. Fig 4: View Of SGCM, Cover & Bolts
    GM1237061Courtesy of GENERAL MOTORS CORP.
  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. Fig 5: 3-Phase Cable Bracket & Nuts
    GM1237062Courtesy of GENERAL MOTORS CORP.
  11. Remove the ignition coil bolts.
    12. Fig 6: View Of Ignition Coil Mounting Bolts
    GM344167Courtesy of GENERAL MOTORS CORP.
  12. Remove the ignition coil.
    13. Fig 7: View Of Ignition Coils & Spark Plug Wires
    GM339300Courtesy of GENERAL MOTORS CORP.
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