Tilt steering does not work, how do I get it to move again? on 2004 Chevrolet Silverado 2500 HD

Moved it up to highest point and now it will not move when I try to move it back down

Try pushing up on wheel, pull tilt lever and try to get wheel back down.... If that works and column locks back in place.... Find a comfortable wheel position....and LEAVE it there!!... IF no luck see a mechanic!... It's a handy feature for a mechanic that needs to work on the steering column.. but otherwise useless on a 'truck' .... Plenty of room to enter/exit the cab!