Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
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If the security light is blinking when trying to start or when you release the key when it will not start this usually indicates that this is a security/theft component at fault needing replaced.I have seen issues with the key itself as the cause in some cases needing replaced as well as the immobilizer that reads the key but also the control unit which is the BCM for the security system can also cause this here.
What has to be done from here is to have the fault codes read out/checked to see what codes are set with this issue here.Once this has been done the codes can then be diagnosed to locate and correct this fault.This has to be done with a compatible scan tool that can plug in and communicate with all computers on your model here.I suspect one of these components listed here is the cause.
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