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 WarningPower Door Locks
Select Power Door Locks and the following may display:
Auto Door Unlock
Unlock Door Anti Lock Out
Delayed Door Lock
Auto Door Unlock
This allows selection of which of the doors will automatically unlock when the
vehicle is shifted into P (Park) or the key is removed.
Select All Doors, ...
Driver or Passenger Seat Adjuster Handle Replacement (4 Way Uplevel)
Driver or Passenger Seat Adjuster Handle Replacement
Callout
Component Name
1
Front Seat Adjuster Handle Cover
Procedure
Use a flat-bladed tool to push inward on the three tabs to release the
handle cover from ...
Water Pump Installation
Clean the sealing surfaces and the 3 coolant pump threads.
Install NEW gasket.
Caution: Refer to Fastener Caution.
Caution: Refer to Torque-to-Yield Fastener Caution.
Install the coolant pump (1).
Install 5 NEW bolts (2) and tighten to 8& ...