Door locks not working 2000 GMC truck.

Not sure if lock has solenoid or electric motor, but either way, can you hear clicks or any prominent sounds from the door whilst trying to unlock it? you may need to put your ear on the door, if no sound, then wiring needs to be checked, then motor or solenoid, if you do hear similar sounds to the other door then the mechanical part of the lock mechanism has failed and may require a kit or replacement.

is it all doors or just one door theres a manual overide on driver door that gives driver control over all doors the driver door lock switch could be bad try useing another door switch see if doors unlock if they do the swich on driver door came loose or is bad

you have to press it twice to unlock all doors or lock all doors.

Need to clean or replace the power door lock actuators.

Some times they get gunked up and will not cycle the lock mechanism.

I have seen some people clean them, and they will work again, but I do not know for how long. Cheap enough to get new ones.

I fixed my doorlock problem today.It did the same thing as yours,it was the relay for the rear door lock and unlock located on the drivers side of dash by the drivers door.easy cheep fix.hope this helps

Replace fuse 57 (15 amp) then disconnect battery and wait 30 to 45 minutes before reconnecting the battery.

My 2006 BMW 325I had the same problem with the door locks not responding. I checked all related fuses and found #57 (15 amp) was the only related fuse blown. I put in a new fuse and it still would not work. I then disconnected the battery for a while then once I reconnected the battery everything worked fine.

I believe I blew the fuse while repeatedly pushing the unlock button rapidly while walking across the parking lock to the car. I suggest only pushing the unlock button only once or twice.

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.

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.

Long beep to follow if successful.

can you use the key its self on the rear door. what i mean is not using the remote but actually using the key?

I have recently had this problem I believe this to has been caused by a fault in the drivers door lock assembly It seems this contains the remote receiver. In my case I think there had been some radio interference being the main cause. The remote system seems to be working OK, The door lock will still not operate with the key.
Remove and replace the fuse 25 resetting the ignition module. Starting the engine, switch off remove the key from the ignition, stay in the car lock the doors using the door button, press and hold the remote unlock button for approx 5 seconds, listen to see if you can hear the clicking of the door receiver when you press the remote buttons. Press and hold lock/unlock button. You may be lucky.