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Replaced the ignition cylinder and now it will not start?

Tiny
TONIMARIE8913
  • MEMBER
  • 2011 GMC TERRAIN
  • 3.0L
  • V6
  • 4WD
  • AUTOMATIC
  • 124,000 MILES
I lost my only key with key fob, so I swapped out cylinder with new one with keys already programmed to it but, it won't allow me to start the car. It came with the 10*10*10 instructions but no luck.
Saturday, October 12th, 2024 AT 8:21 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,874 POSTS
Hi,

The key and lock cylinder you used may have worked on a different vehicle, but the ECU needs programmed to recognize the new part.

I attached the directions below. Note that you will need a scan tool that can communicate and initiate the relearn.

Let me know if this helps.

Take care,

Joe

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Saturday, October 12th, 2024 AT 9:11 PM

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