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Is Crank Relearn Necessary? [Solved]

Yes,according to GM SI. A crank relearn needs done whether it sets a code for it or not. Anything that can affect the crank to cam and ECM relationship requires a crank relearn. A P0300 can be caused by not performing a relearn.1 Mar 2017

How To Relearn A Crank Shaft sensor on Gm After Changing Engine Computer

… you have to do the crankshaft relay you can use your aftermarket scanner i use aftermarket scanner to do

HOW TO RELEARN CRANKSHAFT POSITION SENSOR, CALIBRATE CAMSHAFT POSITION SENSOR

HOW TO

P0335 Crankshaft Position Sensor Relearn procedure with cheap scanner

How to