Truck is parked and shifter is all the way up and the indicator is showing that the truck is in 1st so it won't crank. I can't get the shifter to move at all. Any ideas?

 

Just want to touch "all maybe" the bases.
The brake pedal has to be depressed to activate a solenoid to release the shift lever.
If the solenoid is not releasing, check if the stop lights are working, and check the fuse.
You didn't say whether the vehicle has a console shift or column shift.
Important to know that.