2006 chevy uplander/ will crank but can not take out of park

The brake pedal controls a solenoid to release the shifter.
if you do not hear the click when putting on the brake,could be the problem.,,,there is an shift lock override to release it.pop out the little tab and push a key down to release the shifter.

The shift interlock is probably the problem. With the engine off turn switch to run. Be real quiet and listen closely as you take your foot and put it on the break pedal and start pressing down. You should hear a click in the column, if not you can rapidly take your foot and raise it off the pedal and back on with pressure. This may cause it to jar loose if stuck. That is about the only thing that will keep it from shifting from park.