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 WarningBrake System Warning Light
The vehicle brake system consists of two hydraulic circuits. If one circuit is
not working, the remaining circuit can still work to stop the vehicle. For normal
braking performance, both circuits need to be working
If the warning light comes on, there is a brake problem. Have the brake system ...
Radiator Mounting Stud Repair
Repair Procedure
Note: If the radiator is leaky, replace it. Refer to Radiator
Replacement.
Pressure test the cooling system. Refer to Cooling System Leak Testing.
Grind the fracture surface (1) with a proper tool.
Drill a hole in the cente ...
Starter Replacement (LUV)
Removal Procedure
Disconnect the battery negative cable. Refer to Battery Negative Cable
Disconnection and Connection.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
If equipped with a front suspension skid plate, remove the drivetrain
...