How do I reset the security light in my 2003 Trailblazer?
Asked by Melissa Feb 05, 2018 at 06:15 PM about the 2003 Chevrolet Trailblazer LTZ 4WD
Question type: Maintenance & Repair
My security light is on and my car will not crank. I
have tried a lot of different things that have been
posted and nothing has helped. Can somebody
please help me get my car running. Thanks
5 Answers
Did you try the 20min. key on?
Yes I left it up to 30 min and nothing..all my lights,radio and locks work..just want start..let me make sure I'm doing this right though..can u explain it to me I may be missing something.
if the light is flashing with key on.leave key in the run position for 20 minutes or until the light is on solid ( not flashing ) and see it if starts.
TheStern75 answered 6 years ago
This is a very common problem on GM vehicles. The security system is known to fail. If the system cannot get the correct signal from the key, it assumes the key is incorrect and goes into SECURITY lockout mode. (prevents hotwiring) This has been happening with GM's for a very long time. There are ways to bypass this now. Read through this page for info, solutions as well. http://www.diy-gm-security.com/
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