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 WarningBody Side Frame Rocker Reinforcement Replacement
Removal Procedure
Warning: Refer to Approved Equipment for Collision Repair
Warning.
Warning: Refer to Glass and Sheet Metal Handling Warning.
Note: The body side frame rocker reinforcement is made of
Ultra High Strength Dual Phase Steel and ...
Engine Coolant Thermostat Housing Removal
Caution: Refer to Engine Coolant Thermostat Housing Caution.
Remove the engine coolant thermostat housing retainer nut (4).
Remove the engine coolant thermostat housing retainer (1).
Remove the 4 engine coolant thermostat housing bolts (3).
Remo ...
Differential Carrier Removal (6T40/45/50)
Differential Carrier Removal
Callout
Component Name
1
Front Differential Carrier Bearing Assembly
2
Differential Carrier Assembly
3
Final Drive Sun Gear
...