Q: key does not turn the ignition-it's stuck on 2002 GMC Yukon XL 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
This is first time experiencing this problem
(1) Answer
Verify that your shifter is securely in park. If the ignition cylinder does not see the shifter in park entirely for some odd reason, it will not allow the key cylinder to turn.

Also, make sure the steering wheel is not resting tightly against the steering lock. If it is, jiggle the steering wheel while trying to turn the key.

If none of that works, the key may be worn out (try another key?) or the cylinder may have a tumbler issue internally.

Good luck!