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What is your question?
Son just got 06 chevy trail blazer. Bought new stereo. Once I took out factory unit,tried installing new the security lock came on now truck won't start. Lights come on but nothing else. Csnt afford to take to dealership just trying to help son out.

1 Reply
Won't start OR won't crank? .. There's a big difference in the two! .. Starter motor not working at all OR engine is spinning over ok but won't start? .. The *vehicle* security system should NOT prevent starter engagement!.... Little more details needed.
Good luck to ya!!!