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Where do you here the clicking sound ? in the door , behind instrument panel ? I don't think a blown fuse would do this , possibly a relay ! do you know what a relay is ? This is Chevy factory service information !
Door Lock Operation
When the body control module (BCM) detects a transition of either of the door lock switches to the lock position, it switches the door lock actuator lock control circuit to voltage. Since the lock actuator unlock control circuits are at ground potential within the BCM, the door lock actuator motors transition to the lock position.
There are three pcb relays integrated into the instrument panel fuse box ( non replaceable ) door unlock pcb relay drivers door -door unlock pcb relay an door lock pcb relay ! The BCM controls these relays ! Do you know what a BCM is ?
The DR/LCK fuse supplies battery positive voltage to the I/P fuse block for the door lock system. The body control module (BCM) supplies and monitors a reference voltage to the door lock switch through the door lock switch lock/unlock signal circuit. The door lock switch also receives a constant ground source. If a door lock switch is placed in the lock position or unlock position, the reference voltage is taken directly to ground and the BCM detects the voltage drop on the signal circuit.
The BCM, upon receipt of a door lock switch lock or unlock signal, will switch the appropriate door lock actuator control circuits to battery positive voltage. The opposing side of the door lock actuators are connected to ground internally within the BCM through the other door lock actuator control circuit and the doors will lock or unlock appropriately.
With out have a factory GM tech 2 scan tool ,It would be best if you took this to a Chevy dealer . The first part of diagnosing this problem is to hook up a scan tool !
Inside the door is an electric motor that pulls the door lock down to the locked position, either the rod has come off to the door latch from the door lock motor or the motor has failed. Remove the door panel and check it for power when the button is pressed for the power locks, if it gets power then it is most likely the motor that is the problem.
First of all, check ACC fuse in the driver side junction box. The central controller for power door locks is the body ECU. From your description it may be working only partially. Can the doors be locked using a key? If so, this would indicate the actual locking mechanism is OK. Do the front door lock control switches lock the doors?
Hello.. Not 100% sure what you mean, but if your saying that when you use the keyfob, only the drivers door unlocks, try pressing unlock twice in quick succession. This should unlock all the doors. Hope this helps.
When the door locks make a buzzing sound this means the lock actuator for that door is bad and will need to be replaced. If the locks do not work at each door and only from the drivers switch. Then either the lock-out on the drivers switch is on or the drivers switch is staying in lock-out. The other possibility could be that the lock actuator for the other door is bad.
You should replace power door lock at front passenger side, you can use any 'universal' power door lock. its an unit with a small motor inside that have a mechanism to up and down according electricity from the actuator (master door lock at driver side)
Hope this help :-)