You need to install new O-ring seals to the CKP sensor, and lightly lubricate the O-ring seals with clean engine oil. Then you need to install the CKP sensor into the engine block, and add sealer GM P/N 12346004 (Canadian P/N 10953480) to the CKP sensor bolt threads. After that, you need to install the CKP sensor bolt and connect the engine wiring harness electrical connector to the CKP sensor. Finally, you need to lower the vehicle and perform the crankshaft (CKP) system variation learn procedure.
By BobGM Specialist
29/10/2022