How to remove broken stuck headrest (seat) pin holder?

GM headrests are essentially the same. Lower the seat as low as possible to allow enough headroom to remove the headrest. Next raise the headrest, push in the exposed button on one side of the 2 headrest pins that go into the seat. Notice on the other pin is a button that is flush to the plastic hole cover. This is the release button. Press this button in and the adjustment button at the same time and push up on the headrest. See this video: https://www.youtube.com/watch?v=GQJGaWOJDw4

Raise the headrest to its maximum height. Examine the plastic covers the headrest posts stick out of. You are looking for a slide button or a pin hole on the side of the mounting hole.
If there isn't a release button or pin hole they are under a trim cover.
With a small flat screwdriver gently lever the small round cover upwards. This should reveal the release trigger.
If there is no slide button, look for a pin hole on the side of the mount. Unfold a paper clip and insert it into the pin hole. You should hit resistance, move the headrest and paper clip around and the headrest should release and slide out.

theres normally a little button on the side you press on the plastic base where the stem of the headrest goes in, you press that as you lift the headrest up and out of the seat, hope this helps

Tracy, Some just pull straight up and out, there may be a pin hole, lever or button just under head rest which will release and allow head rest to be pulled up or pushed down, it does take some force as they do like to get stuck.
Check the attached links,instruction and guides, Good luck
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should be under warrenty take it to the dealer

there should be a button you push in under the headrest on the top of the seat

On the top of the seat back under the headrest the little square plastic base has a little hole on the left side, push a pin in to release lock while pulling up on headrest. You need to hold headrest up while releasing both postes.

hello,you need to remove your rear seat,,look for your your headrest valve ,there is a lock pin with tension clip in headrest rod ,remove the pin,try to remove your headrest slowly,ty

Im doing the same thing.. Push the headrest full forward, then lift hard to get past last indent in pole.. This worked for the front as well.. i also could not find a hole to push

The headrest has on obvious button to adjust the height and another button kinda hidden to remove the headrest. The black plastic ring at the base where the metal poles insert into the seat is where the two buttons. You probably noticed the obvious on that sticks out of the side of one of the rings. The other plastic ring contains a similar button that is not noticeable due to it being flush with the side of the plastic ring. Adjust the headrest to its highest position, then locate the "hidden" button on the other plastic ring and depress it while lifting on the headrest and it should come out.