LS V8-3.9L VIN A (2003)
1.
Remove all silicone sealant and residue from the ignition coil covers.
2.
Remove all silicone sealant and residue from the area around the notch where the ignition coil harness enters the valve cover. See Figure 3.
REPLACE COIL(S) THAT FAILED STRESS TEST
1.
If the coil failed the stress test, install a new coil-on-plug assembly and spark plug.
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Disconnect the coil-on-plug assembly electrical connector and remove the coil-on-plug assembly.
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Remove the spark plug.
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Install a new spark plug and tighten to 27 Nm (20 lb-ft).
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Apply a light coat of dielectric compound XG-3-A or equivalent, to the inside of the new ignition coil boot. Install a new coil-on-plug
assembly and connect the electrical connector.
2.
Perform Coil Stress Test and replace failed coils on the remaining cylinders that are misfiring.
NOTE:
If more than 2 coils are defective, call the Special Support Service Center for prior approval.
3.
Clear DTCs.
INSTALL COIL-ON-PLUG COVER ASSEMBLIES
1.
Remove all silicone sealant and residue from the ignition coil covers.
2.
Remove all silicone sealant and residue from the area around the notch where the ignition coil harness enters the valve cover. See Figure 3.
3.
Apply a bead of silicone sealant above and below the area of the notch where the ignition coil harness enters the valve cover. See Figure 4.
4.
Install the ignition coil covers and tighten the bolts to 5 Nm (44 lb-in).
5.
If the LH side ignition coil cover was removed, install the evaporative emissions (EVAP) canister purge valve bracket and nuts.
6.
During the diagnosis/replacement of the ignition coil assemblies, was the evidence of water contamination on the ignition coil assemblies in the
