To get the hood open, you can take a screwdriver and (from the right angle) push the hood release lever that the cable pulls on. Sad that our trucks' engine bay can be broken into so easily (though they do make a cover to prevent this).
I put a giant zip tie around that same piece just in case mine ever fails. It's a fail safe/cheap trick I learned from the zr1 forums since c4 hoods/cables have this issue often!To get the hood open, you can take a screwdriver and (from the right angle) push the hood release lever that the cable pulls on.