1987cadallic deville steeringwheel
Hi,
Usually, vehicles with tilt adjust steering, have a small lever just under the steering wheel column. Pulling this lever out, unlocks the wheel. Pushing lever back in, locks the wheel.
Have a look for a lever of this type and once you find it, have your Dad hold the steering wheel at his preferred position, then push the locking lever back up, to lock the wheel in place.
Let me know if you resolve this.....
Cheers,
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