2008 Cadillac SRX Knock Sensor

You should turn the ignition off and remove the engine cover. If you are replacing the Ignition Coil for the cylinder, you should remove and reposition the intake manifold, disconnect the air cleaner duct from the throttle body and the positive crankcase ventilation (PCV) hose from the right bank camshaft cover and remove the intake manifold bolts, the intake manifold brace bolts and the brace and the upper intake manifold with the lower intake manifold to gain sufficient clearance for ignition coil removal. Then, you should remove the ignition coil electrical connector(s), the ignition coil bolt(s), and the ignition coil(s).

You should disable the SIR system, remove the turn signal cancel cam and upper bearing, the theft deterrent control module, the Ignition Lock Cylinder, the ignition switch assembly, 3 pan head tapping screws from the ignition lock cylinder case assembly, and the ignition lock cylinder case from the steering column.

You should turn the ignition, use a scan tool to retrieve the percentage of remaining engine oil and automatic transmission fluid life, measure the main relay circuit voltage at the ECM/TCM/IGN fuse in the underhood fuse block and at the TCM/BATT fuse in the underhood fuse block, disconnect the negative battery cable, remove the TCM/BATT fuse from the underhood fuse block and the ECM/TCM/IGN fuse from the underhood fuse block, unlock and disconnect the front engine wiring harness electrical connector from the ECM and the rear engine wiring harness electrical connector from the ECM, release the locking tabs, remove the ECM from the ECM bracket, depress the locking tabs on the ECM bracket and remove the ECM bracket.