My 2004 Ford Lariat F150 is locked in low side 4x4, have dash switch, but won't release

My 2004 Ford Lariat F150 is locked in low side 4x4, have dash switch, but won't release - 1

Your owners manual should have instructions for taking your truck out of 4x4 low. If you don't have the manual, you can usually download a manual from Ford's website.

Hi so it needs a mechanic to release it and fix it.

Are all the tires the exact same size? If they are not that will cause it to not work properly.