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 WarningLiftgate Strut Replacement
Liftgate Strut Replacement
Callout
Component Name
1
Liftgate Strut
Warning: When a lift gate hold open device is being removed
or installed, provide alternate support to avoid the possibility of
damage ...
Battery Positive Cable Replacement
Removal Procedure
Disconnect the negative battery cable. Refer to Battery Negative Cable
Disconnection and Connection.
Remove the underhood fuse block cover.
Remove the battery positive nut (1) and the battery positive cable (2),
from the underhood fus ...
Crankshaft Rear Oil Seal Replacement
Special Tools
EN-658 Rear Main Seal Installer
For equivalent regional tools, refer to Special Tools.
Removal Procedure
If equipped with automatic transmission, remove the flex plate. Refer
to Automatic Transmission Flex Plate Replacement.
If equipped with a manual transmis ...