I'm betting you have a security indicator flashing when you try to start it.
You have to do a relearn on the security system.
Passlock Reprogramming Auto Learn
You must perform a theft relearn procedure if any of the following components have been replaced:
Passlock sensor
Body control module (BCM)
Powertrain control module (PCM)
The above modules, with the exception for the Passlock Sensor must also be programmed with each module's own vehicle configuration.
Auto Learn
Time required, approximately 10 minutes.
Insure that the battery is fully charged.
Use the scan tool in order to clear the DTCs.
Turn the ignition switch from the OFF position to the CRANK position attempting to start the vehicle. The vehicle will start and then stall.
Leave the ignition switch in the ON position while observing the security indicator.
When the security indicator turns off, which can take up to 10 minutes, turn the ignition switch off. Wait 10 seconds.
The BCM and the PCM will learn the new code on the next start attempt.
In some cases this procedure has to be repeated 3 times.
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Thursday, July 30th, 2020 AT 2:17 PM
