ECM/PIM/BCM Security Link

If the engine control module (ECM), powertrain interface module (PIM) and/or the body control module (BCM) are replaced, the new modules must be security linked to each other. If the procedure is not performed, the engine will not crank or run. If the BCM has been replaced then replace and program all of the key fob transmitters for each of the vehicle's keys. The replacement BCM comes with a new security number replacing the number on the vehicle's security card.