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 WarningLicense Plate Lamp
To replace the license plate lamp bulb:
1. Remove the two screws from the license plate lamp assembly.
2. Turn and pull the license plate lamp assembly down.
3. Turn the bulb socket counterclockwise and pull straight out of the lamp assembly.
4. Remove the bulb by pulling it straight out of ...
Bumpers and Fascias
Specifications
Front Bumper Energy Absorber Replacement
Preliminary Procedure
Remove the front bumper fascia. Refer to Front Bumper Fascia Replacement.
Front Bumper Energy Absorber
Procedure
Unclip from front bumper fascia. ...
Waterleak Test Preparation
GM vehicles are designed to operate under normal environmental
conditions.
The design criteria for sealing materials and components takes into
consideration the sealing forces required to withstand the natural
elements. These specifications cannot take into consideration any artificial ...