Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
Using the bent tip awl, push down on the ignition lock cylinder retaining pin.
Tighten Tighten the screws to 6 N·m (53 lb in).
Important: If a new vehicle/powertrain control module (VCM/PCM) is being installed for the first the manufacturing enable bit will be set and the auto learn procedure may not be necessary.
The following procedure allows for anyone to reprogram the EVO/Passlock™ module learned data code with any tools, other than the scan tool, when any of the following parts are replaced:
The EVO/Passlock™ module will set the DTC B3031 module in the learn mode when entering the reprogramming procedure.
Important: Erase the passlock™ related diagnostic trouble codes (DTCs) that are stored in the VCM/PCM.
The following is the Auto Learn Procedure: