by using hand
If it's the lock itself and not the latch, you might as well replace the lock.
is an idea only-try to remove the back seat and crowl in to the trunk and see if you can turn the lock manualy
How to fix vapor lock on a 2000 Ford Mustang
To fix a Malibu trunk lock, first ensure that the key fob battery is functioning, as a dead battery can prevent the lock from operating. If the lock is physically jammed, inspect it for any debris and lubricate it with a graphite lubricant or WD-40. If the lock mechanism is faulty, you may need to remove the trunk liner to access and inspect the lock assembly for any broken parts or wiring issues. If necessary, consider replacing the lock mechanism entirely.
The cord that provides tension is not in place. Once you get the hood up, and the grill off, there is a ball attached to the cord; it fits into the bottom half of the lock mechanism and should then provide tension to get the lock to pop.
How do you fix the cable in side of the back doors of a 2000 ford f150
To fix the trunk lock on a 1996 Mercedes S500, first, inspect the lock mechanism for any visible obstructions or damage. If the lock is stuck, try applying lubricant to free it up. If the key won't turn or the remote fails, check the battery in the key fob and replace it if necessary. For more complex issues, it may be necessary to remove the trunk lining to access and diagnose the internal lock components or consult a professional mechanic.
To fix a trunk latch that is stuck open, the teeth on the lock may have to be adjusted so the trunk will close. It is also possible that the cable for the trunk latch is broken. To fix the gas cap door latch may require a little bending and adjusting with a pair of pliers.
Crank position sensor, to the right of your oil filter
Shoukld be the fuse for parking/tail, and dash lights
Bring it to your local locksmith
Read your manual. There is a switch in the glove box to disable the trunk release button on the dash. you lock the glove box with the regular key. When you give someone the valet key they can not get in the trunk.