For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningPower Door Latch Description and Operation
Power Door Latch System Components
The power door latch system consists of the following components:
Remote control door lock receiver
Body control module (BCM)
Driver door latch
Passenger door latch
Left rear door latch
Right rear door latch
Door handle assemblies
Power Door Lat ...
Front Bumper Energy Absorber Bracket Replacement
Preliminary Procedure
Remove the front bumper fascia opening cover. Refer to Front Bumper Fascia
Opening Lower Cover Replacement
Drivetrain and Front Suspension Frame Bolt Front
Caution: Refer to Fastener Caution in the Preface section.
Tighten
160 N·m (119 lb ft)
Note: Do NOT reu ...
Battery Disconnect Warning
Warning: Unless directed otherwise, the ignition and start switch
must be in the OFF or LOCK position, and all electrical loads must be
OFF before servicing any electrical component. Disconnect the negative battery
cable to prevent an electrical spark should a tool or
equipment come in contact ...