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 WarningEmblem/Nameplate Replacement
Caution: Refer to Exterior Trim Emblem Removal Caution.
The part and vehicle surface should be 21?°C (70?°F) prior to installation.
The vehicle should remain inside in a temperature range of 21?°C (70?°F) for
1 hour after assembly to allow the adhesive to develop sufficient bo ...
Airbag Roof Side Rail Module Replacement - Rear
Airbag Roof Side Rail Module Replacement - Rear
Callout
Component Name
Warning: In order to prevent SIR deployment, personal injury,
or unnecessary SIR system repairs, do not strike the door or the door
pillar in the ...
Input Shaft Support Replacement (Gen 1)
Input Shaft Support Replacement
Callout
Component Name
1
3-5 Reverse and 4-5-6 Clutch Fluid Seals (Qty: 4)
Note:
Discard the fluid seals. They are not reusable.
Refer to 3-5-Reverse an ...