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 WarningDoor Lock and Ignition Lock Folding Key Blade Removal and Installation
Special Tools
BO-51098 Flip Key Blade Fixture
For equivalent region tools, refer to Special Tools.
Caution: Failure to properly support the Remote Keyless Entry
(RKE) transmitter assembly while replacing the key blade may cause internal
damage to the transmitter assembly. ...
Special Tools
Illustration
Tool Number/Description
EL 38758
EL 50074
J 38758
Parasitic Draw Test Switch
EL 50313
EL 42000
EL 50076
J 42000
...
Starting System Description and Operation
The starter motors are non-repairable starter motors. They have pole pieces that
are arranged around the armature. Both solenoid windings are energized. The pull-in
winding circuit is completed to the ground through the starter motor. The windings
work together magnetically to pull and hold in ...