On my truck, the button is unreliable. It's old and doesn't always activate or deactivate the first time I push the button. It also seems like there is more of a delay waiting for the
PCM to command OD compared to when I flip my toggle switch.
It's only a 1 hr job to wire up a couple of switches, 1 for lock-up, and 1 for OD. Well worth the time investment in my opinion.