You can install a scan tool, monitor the engine control module (ECM) for Diagnostic Trouble Code (DTC), select the crankshaft position (CKP) variation learn procedure, accelerate to wide open throttle (WOT), release in progress and then turn off the ignition for 30 seconds after the learn procedure is completed successfully. The CKP system variation learn procedure is also required when the following service procedures have been performed.
By BobGM Specialist
29/10/2022