Circuit/System Verification

WARNING: This page is about a different car, the 2010 GMC Terrain and 2010 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Because of normal system communications between the BCM and ECM, any immobilizer B-codes must be diagnosed prior to the diagnosis of P-codes.

Perform the Immobilizer Relearn procedure. Refer to Immobilizer System Component Programming .

If the ECM does not complete the learn or vehicle starting remains disabled, replace the K20 Engine Control Module.