2015 Buick Encore Door Lock Motor Replacement - Trax Chevrolet GM 

This video shows the steps to replacing the door lock unlock motor inside the GM latches.
Will need a T10 and a T20 Torx bit to open the latch bodies. The motors just pop out and click back in, no soldering needed.
Motors can be ordered from Ebay Seller azgiant_will
AZgiant also seems to be on Ailexpress with the same parts.
The Ebay Description used was : Central Latch Door Lock Actuator Motor DC280 FC280 for Chevrolet Buick 1020653
1020653 is the part number written on the factory motors.