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 WarningHeated Oxygen Sensor Replacement - Sensor 1
Heated Oxygen Sensor Replacement - Sensor 1
Callout
Component Name
Warning: In order to avoid being burned, do not service the
exhaust system while it is still hot. Service the system when it is
cool.
Prelimi ...
Internal Components Removal
Internal Components Removal
Callout
Component Name
1
1??? Clutch Backing Plate Retainer Ring
Warning: The retainer is under tension. Use care when removing
or installing the retainer. Personal injury could r ...
Low and Reverse and 1-2-3-4 Clutch Housing Cleaning and Inspection
Low and Reverse and 1-2-3-4 Clutch Housing Cleaning and Inspection
Callout
Component Name
Caution: After cleaning the transmission components, allow
to air dry. Do not use cloth or paper towels in order to dry any transmi ...