How do you unstick a seatbelt in a 1977 El Camino?

To unstick a seatbelt in a 1977 El Camino, first, gently pull the seatbelt to see if it will retract. If it's jammed, inspect the retractor mechanism for any visible obstructions or debris. You can also try twisting the buckle to see if it loosens the tension. If these methods don't work, you may need to manually access the retractor by removing the panel covering it for a more thorough inspection and possible repair.