Key will start car, but will not lock/unlock car

If your driver's side door won't lock and unlock with the key and you had to crawl through the trunk to unlock the door, causing the car alarm to go off and preventing the car from starting, here are some steps you can take:

1. Disarm the alarm: If your car alarm is still going off, try disarming it using your key fob or by unlocking the driver's side door with your key.
2. Check the battery: If the car won't start, check the battery to make sure it has a good charge. If the battery is dead, try jump-starting the car or replacing the battery.
3. Check the door lock mechanism: If the driver's side door won't lock and unlock with the key, it's possible that there may be an issue with the door lock mechanism. Check to make sure that the lock is not stuck or damaged, and that the key is not worn or damaged.
4. Check the fuse: If the door lock mechanism is not working, check the fuse for the power door locks. If the fuse is blown, replace it with a new one.
5. Take the car to a professional: If you are unable to resolve the issue on your own, it may be necessary to take the car to a professional mechanic or locksmith for further diagnosis and repair.

Remember to always follow safety guidelines when working with cars and electrical systems, and to consult your car's owner manual for specific instructions and information.

Usually if you use the key in the door lock to lock unlock the door it will disarm the security system on the car, when you unlock the door it has to be the drivers door, lock the door then unlock the door and hold the key in the unlock position for 2 seconds

I’m happy to assist further over the phone at https://www.6ya.com/expert/brock_d67526d2a834c47e

Try reporgraming it

1. Start with key out of ignition, drivers door is open all others closed and
drivers door is unlocked.
2. Insert key into the ignition (Do NOT Turn) and Pull key out.
3. Perform these steps within 40 seconds.
A. Using the power lock switch on the drivers door, perform 5 lock/unlock cycles
starting with lock. Use an even pace and try to go about one cycle per second.
(1Cycle = 1 lock and 1 unlock).
B. Close, then open drivers door.
4. Perform these steps within 40 seconds.
A. Using the power lock switch on the drivers door, perform 5 lock/unlock cycles
starting with lock. Use an even pace and try to go about one cycle per second.
(1Cycle = 1 lock and 1 unlock).
B. Insert the key in the ignition cylinder.
C. Turn the ignition to ON (Do NOT Start) then back to OFF.
D. Remove the key from the ignition.
5. Press any button on remote for a minimum of 1 second.
System should now lock and unlock doors once.

6. Close and open drivers door.
7. Press any button on remote for a minimum of 1 second. System should now lock and
unlock doors. Once to confirm programming, twice to indicate programming failed.
8. Repeat steps 5, 6 and 7 for additional remotes.

Okay, this sounds like theres a problem with the switch inside the door, try this, go to the passenger door and unlock it with the key, note if it has a lock, most newwer cars are only putting locks on drivers door, but if it has one use the key to unlock it and then try to start the car, if theres no lock then try the truck lock, unlock it with the key and try to start the car, if that doesnt work then use the fob to unlock all doors by pushing it two times and then start the car, the problem is the switch inside the door lock, this switch is part of the latch asm, good day.

Synchronization
When
Key buttons operated repeatedly while vehicle out of range and system becomes inoperative.
How
Carry out the following within 1 minute: Press key lock or unlock button for approximately 1 second. Manually lock or unlock vehicle. System should now lock or unlock vehicle. If not, carry out programming procedure.
Programming
When
Key added or replaced. System malfunction.
How
Switch ignition ON. Insert key to be programmed into driver's door lock. Lock vehicle manually. Press lock or unlock button. Wait at least 1 second. Press lock or unlock button again. Vehicle horn sounds to indicate correct programming. Remote controls can also be programmed using diagnostic equipment.
NOTE: A maximum of 4 keys can be programmed.

you have to use the second key for 3month and try that first key

Have you ever changed the battery in the key fob? Next time you go to start it unlock it by using the key in the drivers door lock turn to the unlock position and hold there your windows will lower and sunroof will open. Get in and start car if you do not have to lock/unlock to start change the fob battery if you do need the lock/unlock move your chip in your key is bad

1. sitting in driver seat, with driver's door OPEN, press lock/unlock button ON THE DRIVERS DOOR to lock all doors, then manually unlock driver door only.
2. Insert YOUR key in ignition, DO NOT TURN, then remove key.
3. Using the same lock/unlock button ON THE DRIVERS DOOR, slowly press lock-unlock in 5 cycles
4. Shut door.
5. Open door.
6. Using the same lock/unlock button ON THE DRIVERS DOOR, again slowly press lock-unlock in 5 cycles
7. With the door open insert your key into the ignition, turn to 'on' position (DON'T START), wait 5 seconds. Turn off and remove key.
8. Locks should cycle once (Car will lock and then unlock once by herself). If they don't cycle or they cycle more than once, do steps 1-7 over.
9. Now using the remote, push lock button, hold for one second, then release the button. The locks should cycle once. If not, start over and go slower.
10. Close the door.
11. Open the door.
12. Press the lock button on the remote. The locks should do a lock-unlock cycle.
13. Close the door
14. Press the lock button on the remote, the doors should lock.
15. Press unlock button and the doors should unlock.

Remote Programming Instructions

1. Driver's door OPEN and unlocked, all other doors closed and locked.

2. Insert YOUR key in ignition, DO NOT TURN, remove key.

3. Using the MANUAL lock/unlock button ON THE DRIVERS DOOR, slowly press lock and unlock 5 times (count the lock 5 times and unlock 5 times).

4. Shut door.

5. Open door.

6. Using the lock/unlock button ON THE DRIVERS DOOR, slowly press lock and unlock 5 times (count the lock 5 times and unlock 5 times).

7. With the door open insert your key into the ignition, turn to on position (DON'T START), wait 5 seconds. Turn off and remove key.

8. Locks should cycle once (Car will lock and then unlock once). If they don't cycle or they cycle more than once, do steps 1-7 over.

9. Now using the remote, push lock button, hold for one second,
release. The locks should cycle once. If not, start over and go slower.

10. Close the door. Open the door. Press the lock button on the remote. The locks should cycle. Close the door. Press the lock button on the remote, the doors should lock. Press again and the doors should unlock.

try this:

1. Start with key out of ignition, drivers door is open all others closed and
drivers door is unlocked.
2. Insert key into the ignition (DO NOT Turn) and Pull key out.
3. Perform these steps within 40 seconds.
A. Using the power lock switch on the drivers door, perform 5 lock/unlock cycles
starting with lock. Use an even pace and try to go about one cycle per second.
(1Cycle = 1 lock and 1 unlock).
B. Close, then open drivers door.
4. Perform these steps within 40 seconds.
A. Using the power lock switch on the drivers door, perform 5 lock/unlock cycles
starting with lock. Use an even pace and try to go about one cycle per second.
(1Cycle = 1 lock and 1 unlock).
B. Insert the key in the ignition cylinder.
C. Turn the ignition to ON (Do NOT Start) then back to OFF.
D. Remove the key from the ignition.
5. Press any button on remote for a minimum of 1 second.
System should now lock and unlock doors once.

6. Close and open drivers door.
7. Press any button on remote for a minimum of 1 second. System should now lock and
unlock doors. Once to confirm programming, twice to indicate programming failed.
8. Repeat steps 5, 6 and 7 for additional remotes.