Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Buick Century BaseFACTORY OEM SERVICE PROCEDURE
Automatic Transmission Shift Lock Control Component Views
| Callout | Component Name |
|---|---|
| 1 | Automatic Transmission Shift Lock Control Solenoid (Century) |
| 2 | C201 |
| 3 | C205 (UK3) |
| 4 | C207 |
| Callout | Component Name |
|---|---|
| 1 | A/T Shift Lock Control Switch |
| 2 | A/T Shift Lock Control Switch Connector |
| 3 | I/P Wiring Harness |
| 4 | C240 |
| Callout | Component Name |
|---|---|
| 1 | Park Lamp Relay |
| 2 | Brake to Shift Relay |
| 3 | P100 |
| 4 | Fuse Block-I/P |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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