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Theft lock preventing vehicle from starting

Tiny
KRISTYN NORDICK
  • MEMBER
  • 1999 GMC SIERRA
  • 4WD
  • AUTOMATIC
  • 120,000 MILES
I lost my keys so somebody tried to fix it and did not know what they were doing and ended up braking some parts. So I bought a new ignition at the junk yard and installed it and now the cars security lock has need activated and I cannot start my vehicle. Is there any way to bypass this theft lock?
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Monday, October 22nd, 2018 AT 4:57 PM

1 Reply

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I am Danny.

I have attached a tutorial showing you an Anti-Theft relearn procedure. If this does not work keep us informed. Hope this helps and thanks for using 2CarPros.
Danny-

https://www.2carpros.com/articles/how-to-reset-a-security-system
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Wednesday, October 24th, 2018 AT 3:16 AM

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