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Q: ignition problems on 2001 Chevrolet Impala

my security warning light keeps coming on.
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No way to diagnose this without the use of a scan tool. This could be related to the theft deterrent system, the Body Control Module, Powertrain Control Module or Instrument Panel Cluster or any related wiring. Best advice is to take it to a shop and get them to test the system and see if any codes are present in any module with a scan device. Hope this helps
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