If you replaced the cylinder and it will not turn now, then it sounds like you have an issue with the cylinder or the key. So, let's start with this guide that will help with stuck keys.
If these things check out and do not work, then we most likely need to inspect the shift lock solenoid which is most likely causing the key to not turn.
You should be able to check the fuse 10 in the under-hood fuse box and make sure it is not blown as this will lock the solenoid.
Lastly, I am attaching the wiring diagrams below which will help with this, but we are going to have to move onto the key interlock solenoid and check the voltage on this circuit and find out if you have it engaged.
However, let's get to that if none of this works.
Images (Click to enlarge)
Thursday, March 24th, 2022 AT 10:11 AM