2016 Yukon Denali Intermittent Starting Issues

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Real_Talk

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2016 Yukon Denali around 92K Miles. Is having some intermittent starting issues. Issues started about 2-3 months ago, and hasn’t happened since until today.

Issue:
Accessory will turn on (radio, lights, etc) but will not crank or start. Battery is good. This seems to always happen when my wife is driving, so getting the details from her on what happens. All accessories work, because the Bluetooth connects and I talk to her through the car when it’s not starting.

First time it happened, I read the steering wheel lock may be an issue. Had her move the steering wheel (which moved, wasn’t locked) and repeatedly push the brake. She did this several times and it started. She states the brake is hard to push, but I think it’s because she pushes it a few times then it builds pressure so won’t push down anymore.

Same thing happened today, she tried all the steps as above, still would not start. I started heading her way to diagnose, but she kept at it a bit more and it started.

Last time this happened it was hot the day before then cool the day the issue happened. Today it cooled down a lot outside and the issue happened. But every time it has happened, she was able to start the car (being in the garage), maybe run 1-2 errands, then on that third start it will not start.

I feel like it has something to do with the steering control lock, but today the steering was not locked as she was able to move it left and right as much as it would allow.

This is a push button starter, with electric tilt steering wheel.

Any ideas as to what may be causing the issue?

I removed the steering column cover tonight and started/stopped/put into accessory several times. I can hear the steering column lock and feel it engage/disengage. I’m stuck on this steering lock PN 23309449 as the issue, but not sure if it’s even that.
 

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