GM 84243380 Lift Gate Latch Assembly

The power door lock system operates using door lock actuators mounted in each door and includes switches, actuators, lock and unlock relays, the Body Control Module (BCM), and associated wiring. Diagnosis usually involves simple checks of wiring connections and actuators for minor faults. The system utilizes bi-directional solenoids in the doors, mounted as part of the door latch. Lock switches have Lock and Unlock positions, sending signals to the BCM, which activates the door lock relays, providing voltage to each door lock solenoid. To troubleshoot, check circuit protection first, including fuses and circuit breakers. Verify voltage at the switches and check for continuity; if necessary, replace faulty switches. Check the wiring between the switches, BCM, door lock relay, and solenoid if needed. In case of an inoperative solenoid, test for voltage and ground, check for breaks in the wiring, and replace the solenoid if necessary. Communication for the power door lock system passes through the Body Control Module, and if the issue remains unresolved, retrieve trouble codes from the BCM using a scan tool. The keyless entry system uses a remote control transmitter sending an infrared signal to the receiver to operate the door lock system. Replace the battery when the transmitter's range decreases. To replace the key remote control battery, carefully separate the case halves, replace the battery, and snap the case back together. Programming replacement transmitters requires a specialized scan tool, so take the vehicle and transmitters to a dealer or qualified repair shop with the necessary tool to have the transmitter(s) programmed into the vehicle. Up to eight key fobs can be programmed to one car, and all fobs must be present during reprogramming.

To remove the outside handle, open the door and remove the small access cover. Loosen the retainer but do not remove it. Pull the door handle out halfway and remove the small cover, then remove the handle.

Reinstallation is done in the reverse order of removal for both components.

Remove the door trim panel, disconnect the actuator cable from the inside door handle, and then remove the handle from the door panel, with installation being the reverse of removal.

Programming replacement transmitters for the keyless entry system requires a specialized scan tool. Therefore, you should take the vehicle and transmitters to a dealer service department or qualified repair shop for programming.

A few drops of light oil or lock lubricant.

It reduces wear and ensures free movement.

Carefully pry or pull off the handle trim cover.

For installation, simply reverse the removal process.

Installation is the reverse of removal.

To remove the inside release handle from a door, release its cable and remove the mounting fasteners.

To remove the lock cylinder from a door handle, pry off the retaining clip and withdraw it from the door handle.

The components that can be removed and installed are the latch, lock cylinder, outside handle, inside release handle, and latch strikers.

If equipped, detach any linkage to the lock cylinder.

The outside handle can be removed by either removing the bolt cover and bolt, or by unclipping the lock trim cover and using a hooked tool to hold the bellcrank lever in the partially opened position while removing the handle.

In case of an inoperative solenoid, you should test for voltage and ground, check for breaks in the wiring, and replace the solenoid if necessary.

Up to eight key fobs can be programmed to one car, and all fobs must be present during the reprogramming process.

They should be lubricated with a thin coat of grease.

Remove the latch mounting bolts and withdraw the latch from the end of the tailgate.

If there are communication issues with the power door lock system, it is recommended to consult a dealer or qualified shop with the proper scan tool to retrieve trouble codes from the BCM for diagnosis.