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Q: My security light is flashing on in my truck when try to crank it up it will cut on 1998 GMC 1500 Pickup

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
right off what causes this to happen I do not happen to see my motor size which is 350 vortex
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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Got another key? If so try it. Possible dirty lock cylinder or key, damaged key, can try turning key on for about 15 min.then off to reset passlock if battery in good shape. May be some info. in the owners manual.
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