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:

California Proposition 65 WarningDome Lamps
The dome lamp controls are in the headliner above the rear seats.
(Dome Lamp Override): Press to turn
the lamps off, even when a door is open.
(Door): When the button is returned
to the middle position, the lamps turn on automatically when a door is opened.
| (On): Press to turn on the dom ...
Rear License Plate Lamp Bulb Replacement (Sedan)
Rear License Plate Lamp Bulb Replacement
Callout
Component Name
Preliminary Procedure
Remove the rear license plate lamp housing. Refer to Rear License Plate
Lamp Replacement.
1
License Plate La ...
Headlamp Aiming
Visual Aiming Preparation Procedure
Note: Some state and local laws specify requirements for headlamp
aim. Comply with all of these laws when performing any headlamp aiming operations.
Headlamp aim should be checked:
When a new headlamp capsule is installed.
If ser ...