Diagnostic Aids

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Inspect for the following conditions:

Any secondary ignition wires arcing to a wiring harness and for carbon tracking or other signs of damage
A faulty ignition coil
The ignition control module and the coils for cracks, carbon tracking or other signs that indicate that the coil secondary circuit is arcing to the ICM or to the ICM wiring harness. Refer to Ignition Coil(s) Replacement .

If the condition is suspected of being intermittent, refer to Testing for Intermittent Conditions and Poor Connections .