Chevrolet 15918137 Front Side Door Lock Assembly

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To replace the latch, first raise the window completely and remove the door trim panel along with the rear section of the watershield. Detach the latch rods from the lock cylinder, outside handle, and inside handle, working through the opening in the door. Remove the three Torx-head mounting screws, which may require an impact-type driver to loosen, and then take the latch out of the door. If possible, disconnect the rods while the latch is still in place; otherwise, pull the latch out with the rods attached, then disconnect the rods and electrical connectors. For installation, reverse the removal procedure and ensure the door latches and unlatches properly. To remove the lock cylinder, first take off the outside door handle and disconnect the link. The lock cylinder is secured with either two bolts or a retainer; if it has a retainer, use a screwdriver to push it off. After removing the lock from the door handle, installation follows the reverse of removal. For the outside handle, disconnect the links from the handle and the lock cylinder rod, remove the mounting bolts, and detach the handle from the door. Reposition the handle, attach the link, and install the nut(s), tightening them securely. To remove the inside handle, first take off the door trim panel, then slide the handle rearward to detach it from the holes and remove it from the door, allowing for the disconnection of the two cables. For minor door adjustments regarding latch alignment, loosen the bolts on the latch striker mounted opposite the latch, move the striker slightly as needed, and then retighten the bolts while checking for proper latch operation; the striker can be adjusted up-and-down or left-and-right.

The power door lock system operates the door lock actuators in each door, consisting of switches, actuators, Body Control Module (BCM), and associated wiring. Diagnosis typically involves checking the wiring connections and actuators for minor faults that can be easily repaired. The system is operated by bi-directional solenoids located in the doors, with lock switches having two positions: Lock and Unlock. These switches send a signal to the BCM, which then sends a signal to the door lock solenoids. It is important to check the circuit protection first, as some vehicles use a combination of circuit breakers and fuses. If no voltage is present at the switches, the wiring between the fuse panel and the switches should be checked for shorts and opens. If voltage is present, the switch should be tested for continuity and replaced if there is none. If it has continuity, check the wiring between the switch and the solenoid. If all but one lock solenoids operate, the trim panel should be removed from the affected door to check for voltage at the solenoid while the lock switch is operated. If the inoperative solenoid is not receiving voltage, an open or short in the wire between the lock solenoid and the relay should be checked.

If the inoperative solenoid is receiving voltage, it should be replaced.

The hinges and latch assemblies should be lubricated once every 3000 miles or every three months.

The hinges and latch assemblies should be lubricated once every 3000 miles or every three months.

The hinges and latch assemblies should be lubricated once every 3000 miles or every three months.

Loosen the bolts on the latch striker mounted opposite the latch, move the striker slightly as needed, and then retighten the bolts while checking for proper latch operation; the striker can be adjusted up-and-down or left-and-right.

The hinges and latch assemblies should be lubricated once every 3000 miles or every three months.