Silverado 2008

Ignition Coil Pack

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Removal & Installation



4.3L Engines
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the air cleaner outlet resonator.

    Click image to see an enlarged view

    Fig. Air cleaner outlet resonator assembly-4.3L engines

  6.  
  7. Properly relieve the fuel system pressure.
  8.  
  9. Disconnect the fuel feed pipe quick fitting from the engine fuel feed pipe.
  10.  
  11. Disconnect the engine wiring harness electrical connector from the MAP sensor and EVAP sensor.
  12.  
  13. Remove the CPA retainer at the fuel meter body. Disconnect the electrical connector.
  14.  
  15. Remove the harness clips. Remove the rear bracket bolts and bracket.
  16.  
  17. Note the routing of the spark plug wires prior to disconnecting the wires from the ignition coil. Disconnect the wires.
  18.  
  19. Remove the spark plug wire retainer from the ignition coil bracket. Reposition the wires out of the way.
  20.  
  21. Disconnect the engine wiring harness electrical connector from the ignition coil.
  22.  
  23. Remove the ignition coil retaining bolts and ignition from the bracket.

    Click image to see an enlarged view

    Fig. Ignition coil and related components-4.3L engines

  24.  

To install:


NOTE
Be sure to use new fasteners, as required.

  1. Position the component on its mounting.
  2.  
  3. Continue the installation in the reverse order of the removal procedure.
  4.  
  5. Connect the negative battery cable.
  6.  
  7. Start the engine and check for fuel leaks. Correct as required.
  8.  

Testing



  1. Connect scan tool to vehicle-s Data Link Connector and follow scan tool instructions to download diagnostic Trouble Codes (DTCs).
  2.  

Diagnostic Trouble Code (DTC) list:



DTC P0351: Ignition Coil 1 Control Circuit
 
DTC P0352: Ignition Coil 2 Control Circuit
 
DTC P0353: Ignition Coil 3 Control Circuit
 
DTC P0354: Ignition Coil 4 Control Circuit
 
DTC P0355: Ignition Coil 5 Control Circuit
 
DTC P0356: Ignition Coil 6 Control Circuit
 
DTC P0357: Ignition Coil 7 Control Circuit
 
DTC P0358: Ignition Coil 8 Control Circuit
 
DTC P1351: Ignition Coil Control Circuit High Voltage
 
DTC P1361: Ignition Coil Control Circuit Low Voltage
 

  1. If a DTC indicates an ignition coil is faulty before replacing the ignition coil check wiring for short circuits, broken or chafed wires, loose connections and corroded terminals.
  2.  

 
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